Basic College Mathematics (9th Edition)

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

Chapter 5 - Ratio and Proportion - Review Exercises: 28

Answer

$x=20$

Work Step by Step

We can set the cross products of the given proportion equal to each other and then solve for the unknown variable. $16\times15=x\times12$ $240=12x$ Divide both sides by 12. $\frac{240}{12}=\frac{12x}{12}$ $x=20$
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