Elementary Geometry for College Students (5th Edition)

Published by Brooks Cole
ISBN 10: 1439047901
ISBN 13: 978-1-43904-790-3

Chapter 5 - Section 5.1 - Ratios, Rates, and Proportions - Exercises - Page 227: 22b

Answer

This image shows the triangular representation of the problem as well as the algebraic method of solution.
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Work Step by Step

Using the definition of geometric mean, I set up a proportion to find DC. The labelled diagram helped me keep track of the components of the problem.
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