Find the third proportional to:
5,10
Let the third proportional be x, Then-
so the proportion be, 5:10::10:x
Now, if a:b::c:dbe in proportion then
a×d=b×c --------------------------------eq(1)
so, now in 5:10::10:x
a=5,b=10,c=10,d=x
So, by eq(1) we have,
⇒5×x=10×10⇒5x=100⇒x=1005⇒x=20
Hence, the third proportion be 20
Find the third proportional to 24,36
0.9,1.8