Chapter 8, Problem 2RP

To determine

To find the fourth proportion.

Answer to Problem 2RP

The fourth proportion is 12.

Explanation of Solution

Given information:

The first three terms are 4, 6 and 8.

Formula used:

A proportion is an equation stating that two or more ratios are equal.

Proportion is $\frac{4}{6}=\frac{8}{d}$

In this form, 4 is called the first term. 6 is called the second term. 8 is called the third term. d is called the fourth term.

Calculation:

  $\begin{array}{l}\frac{4}{6}=\frac{8}{d}\\ \therefore 4d=48\\ \therefore d=12\end{array}$

The fourth proportion is 12.