with the following data given,
LI = 3
LK = 4
PO = 14.4
PM =?
let PM = x
so,
3/4 = x/14.4
cross multiply
4x = 14.4 X 3
4x = 43.2
divide both sides by 4
4x/4 = 43.2/4
x = 43.2/4
x = 10.8
therefore, PM = 10.8
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