Final answer:
Without specific numerical data on the side lengths of the triangles, it is impossible to determine the missing side of the smaller triangle using proportions of the sides in similar triangles.
Step-by-step explanation:
The question is asking to find the missing side of the smaller triangle when two triangles are given to be similar. In similar triangles, corresponding sides are proportional. This means that the ratio of any two corresponding sides in one triangle is equal to the ratio of the corresponding sides in the other triangle. If we are given the sides of one triangle and only some of the sides of the similar triangle, we can set up a proportion to solve for the unknown side.
To find the missing side, we would normally use the information provided to create a ratio between the corresponding sides of the two similar triangles. However, the question does not provide enough specific numerical data for these triangles to calculate the missing side directly. We would need the measurements of at least one pair of corresponding sides and the length of either the side that corresponds to the missing side in the other triangle or another pair of corresponding sides.