Basic College Mathematics (10th Edition)

Published by Pearson
ISBN 10:
ISBN 13:

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



Work Step by Step

We are given the proportion $\frac{15}{10}=\frac{3}{x}$. We can set the cross products equal to each other and solve for the unknown variable. $15\times x=10\times3$ $15x=30$ Divide both sides by 15. $x=2$
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