30 POINTS! Please help me with 8th grade math - Question is below


Heidi hikes two trails, the Big Trapezoid and the Little Trapezoid. The shorter base of the Big Trapezoid is 2 mi long, while the longer base is 8 mi. The longer base of the Little Trapezoid is 4 mi long. The trails are similar shapes.



What is the length of the shorter base of the Little Trapezoid trail?


_____ miles


Thanks! Please give me an explanation of why your answer may be correct :D