You have not attached the image, therefore, I cannot provide an exact answer.
However, I will tell you how to solve this problem and you can apply on the numbers you have.
Assume that the base of the original triangle has a length of x units.
Applying a scale factor of 1/4 means that all new dimensions of the triangle will be reduced to 1/4 of their original value.
Based on this,
the base of the new triangle after applying 1/4 scale factor would be (1/4)*x which is equal to 0.25x
Hope this helps :)
