Respuesta :
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We can represent the situation like that:
Y=-15 and x=-20
Then When y=12 x=?
We make x(The unknown) *-15=12*(-20)
We have an simple équation to solve
Thus x=(12*(-20))/-15
X=16
x1= -20
x2= x2
y1= -15
y2= 12
x1 : x2 :: y1 : y2
-20 : x :: -15: 12
Means = x and -15
Extremes= -20 and 12
Product of mean = Product of extremes
-15x = -20*12
x = -240/-15
x2 = 16
x2= x2
y1= -15
y2= 12
x1 : x2 :: y1 : y2
-20 : x :: -15: 12
Means = x and -15
Extremes= -20 and 12
Product of mean = Product of extremes
-15x = -20*12
x = -240/-15
x2 = 16