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Prahar wants to bake homemade apple pies for the school bake sale. The recipe for the filling of a homemade apple pie that serves 8 consists of the following ingredients:

- [tex]$\frac{3}{4}$[/tex] cup sugar
- [tex]$\frac{3}{5}$[/tex] teaspoon cinnamon
- [tex]$\frac{1}{8}$[/tex] teaspoon ground nutmeg
- [tex]$\frac{1}{4}$[/tex] teaspoon salt

Prahar would like to serve 22 people. Choose one of the ingredients from the recipe and determine the amount he would need for a serving of this size. Set up the proportion and show all necessary work using fractions or decimals.


Sagot :

Sure, let's start by choosing one of the ingredients from the recipe — we will use sugar for this purpose.

1. Identify the given quantity for a serving of 8 people:
The recipe calls for [tex]\(\frac{3}{4}\)[/tex] cup of sugar to serve 8 people.

2. Set up the proportion to find the required amount for 22 people:
We need to determine how much sugar is needed for 22 people. Let's denote:
- [tex]\(s_8\)[/tex] as the amount of sugar for 8 people.
- [tex]\(s_{22}\)[/tex] as the amount of sugar for 22 people.

The proportion can be written as:
[tex]\[ \frac{s_8}{8} = \frac{s_{22}}{22} \][/tex]

3. Substitute the values into the proportion:
We know that [tex]\(s_8 = \frac{3}{4}\)[/tex] cup.

So we have:
[tex]\[ \frac{\frac{3}{4}}{8} = \frac{s_{22}}{22} \][/tex]

4. Solve the proportion for [tex]\(s_{22}\)[/tex]:

To isolate [tex]\(s_{22}\)[/tex], we multiply both sides of the equation by 22:
[tex]\[ s_{22} = 22 \times \frac{\frac{3}{4}}{8} \][/tex]

5. Simplify the right-hand side:

- First, simplify the fraction inside the multiplication:
[tex]\[ \frac{\frac{3}{4}}{8} = \frac{3}{4 \times 8} = \frac{3}{32} \][/tex]
- Then, multiply by 22:
[tex]\[ s_{22} = 22 \times \frac{3}{32} \][/tex]

6. Calculate [tex]\(s_{22}\)[/tex]:

- Multiply the numerators and denominators:
[tex]\[ s_{22} = \frac{22 \times 3}{32} = \frac{66}{32} \][/tex]

- Simplify the fraction:
[tex]\[ \frac{66}{32} = 2.0625 \][/tex]

Therefore, [tex]\(s_{22} = 2.0625\)[/tex] cups.

7. Conclusion:
The amount of sugar needed for 22 people is [tex]\(2.0625\)[/tex] cups.