Using a proportion, solve for x

The value of x is 6, because values are doubled based on the primary value.
Step-by-step explanation:
From the given diagram,
At the top first value is 4 and second value is 8
The logic in the top of the triangle is based an multiply by first value.
Let, P - First value
Q - Second value
From given, we know that
Q = 2 × P (∵ P=4, Q = 2 × P = 8)
Refer the attachment,
For the vertical side of triangle,
Q = 2 × P
= 2 × 7
Q = 14
From the given and attachment,
x+8 = Q
x+8 = 14
x = 6
Result:
The value of x is 6, because values are doubled based on the primary value is clearly in attachment.