Elementary Algebra

Published by Cengage Learning
ISBN 10: 1285194055
ISBN 13: 978-1-28519-405-9

Chapter 4 - Proportions, Percents, and Solving Inequalities - Chapter 4 Review Problem Set - Page 183: 16


The diameter of the circle is 63 centimeters.

Work Step by Step

Let x represent the diameter of the circle that we need to find. Now, let’s set up a proportion with the ratio given and a ratio which compares the circumference of the circle to the diameter of the circle. $\frac{22}{7}$ = $\frac{198}{x}$ To solve this equation, we equate the cross products. 22 $\times$ x = 7 $\times$ 198 22x = 1386 Divide both sides by 22. x = 63 The diameter of the circle is 63 centimeters.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

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.