### Home > CC3MN > Chapter 9 > Lesson 9.1.1 > Problem9-15

9-15.

Eric set up this ratio for two similar triangles:

$\frac { x } { 12 } = \frac { 5 } { 9 }$

He solved the problem and found $x ≈ 6.67$. What was his mistake?

Examine the ratios Eric created. Did he set up his ratios correctly?