Basic College Mathematics (9th Edition)

Published by Pearson
ISBN 10: 0321825535
ISBN 13: 978-0-32182-553-7

Chapter 5 - Ratio and Proportion - 5.4 Solving Problems - 5.4 Exercises - Page 356: 11

Answer

$x=5$

Work Step by Step

We are given the proportion $\frac{x}{25}=\frac{4}{20}$. We can set the cross products equal to each other and solve for the unknown variable. $x\times20=25\times4$ $20x=100$ Divide both sides by 20. $x=5$
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