## Prealgebra (7th Edition)

Published by Pearson

# Chapter 6 - Section 6.2 - Proportions - Exercise Set - Page 427: 38

#### Answer

$x=4$

#### Work Step by Step

We are trying to solve for the given variable so that the proportion is true. To determine if a proportion is true, we have to find if the cross products are equal. The cross products of $\frac{a}{b}=\frac{c}{d}$ are $a \cdot d$ and $b \cdot c$. $x*9=12*3$ $9x=36$ $9x\div9=36\div9$ $x=4$

After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.