Advertisements
Advertisements
प्रश्न
Find the fourth proportional to 3, 12, 15
Advertisements
उत्तर
Let fourth proportional to
3, 12, 15 be x.
then 3 : 12 :: 15 : x
⇒ 3 × x = 12 x 15
x = `(12 xx 15)/(3)`
= 60.
APPEARS IN
संबंधित प्रश्न
If q is the mean proportional between p and r, show that: pqr(p + q + r)3 = (pq + qr + rp)3.
Find the fourth proportional to 2xy, x2 and y2.
Find the third proportion to the following :
3 and 15
If `a/b = c/d = e/f`, prove that `(ab + cd + ef)^2 = (a^2 + c^2 + e^2) (b^2 + d^2 + f^2)`.
Find the mean proportion of: (a – b) and (a³ – a²b), a> b
If 4 : 5 : : x : 35, then the value of x is
If b is the mean proportional between a and c, prove that a, c, a² + b², and b² + c² are proportional.
If a, b, c, d are in continued proportion, prove that: `(a^3 + b^3 + c^3)/(b^3 + c^3 + d^3) = a/d`
Write True (T) or False (F) against the following statement:
21 : 6 : : 35 : 10
The first, third, and fourth terms of a proportion are 9, 24, and 32. Find the second term.
