Recall that the centroid has the special property that, for each median, the distance from a vertex to the centroid is twice that of the distance from the centroid to the midpoint of the side opposite that vertex.
1)
EH is median.


2)
Here K is the centroid of the triangle and EH is the median.
We know that

Substitute Ek=6 in the equation, we get




3)
Given that FI=18
We know that


Substitute FI=18 in the equation, we get




4)
Given JK=4.
We know that

Substitute JK=4 in the equation, we get



Answer is



