For the Pair of Similar Triangles, Find the Length of the Indicated

Multiple Choice

For the pair of similar triangles, find the length of the indicated side.
- In the outer triangle, the shortest side has length 6 , and the middle side has length 9 . In the inner triangle, the shortest side has length 2 , the middle side has length 3 , and the longest side has length 4 . Find the length, $x$ , of the longest side of the outer triangle.

A) $x=16$
B) $x=11$
C) $x=4$
D) $x=12$