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Expert-verified Found in: Page 287 ### Pre-algebra

Book edition Common Core Edition
Author(s) Ron Larson, Laurie Boswell, Timothy D. Kanold, Lee Stiff
Pages 183 pages
ISBN 9780547587776 # Pizza You know that 3 pizzas are enough to feed 12 people. Write and solve a proportion to find the number of pizzas that will feed 28 people.

7 pizzas will feed 28 people.

See the step by step solution

## Step 1.  Given

Given that 3 pizzas feed 12 people.

## Step 2.  To determine

We have to write and solve the proportion and find the number of pizzas that can feed 28 people.

## Step 3.  Calculation

Given that, 3 pizzas are enough to feed 12 people.

Let, x is the number of pizzas to feed 28 people.

So, the proportion is given by,

$\frac{3}{12}=\frac{x}{28}$

Then we solve the equation:

$\begin{array}{c}\frac{3}{12}=\frac{x}{28}\\ \frac{3}{12}×28=\frac{x}{28}×28\text{}\left[\text{divide each side by 28}\right]\\ \frac{84}{12}=x\text{}\left[\text{divide}\right]\\ x=7\end{array}$

Therefore, 7 pizzas will feed 28 people. ### Want to see more solutions like these? 