Answer:
x = 12/5
Explanation:
Since the original is 10 and the second is 6, that means that the scale is 10:6 or 5:3. It can also be related as %60 of the length.
Step 1: Make an equation
10/6 = 4/x
Step 2: Cross Multiply
10x = 24
Step 3: Divide
10x / 10 = 24 / 10
24/10 = 12/5
x = 2.4