What is the missing length for this one?

The missing length is 8

Step-by-step explanation:

Represent the missing length with x

The non-parallel sides of the given shape are directly proportional.

Mathematically:

3 to 6 and 4 to x

Represent as a ratio:

Convert to fraction

Cross Multiply:

Divide through by 3

The length of the missing side is 8

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right

unless if u could do my questions, if not i wouldn't want to