Parameters Provided:

The diagram of the question is shown below:
For similar triangles, the ratios of any two corresponding sides are equal. Hence, we can postulate from the image above that:

The values of FG and YZ are given already in the question.
To get FR and YS, we are told FR is 1 less than YS. Therefore,

Substituting these values into equation A, we have:

Multiply both sides by (12 x 18):

Collecting like terms:

To get FR:

Therefore, the lengths of the medians are:
