What is the value of x?

Since it is proportional, whatever values we get in the other shape can be used to compar with the first.

As we can see, 5 is proportional to the 10 in the first shape.

Which means we have to manipulate the 10 to get 5

10/2=5

So we now know that the other shape is the first but divided by 2

15/2= 7.5

X = 7.5

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