Advertisements
Advertisements
Question
Find the fourth proportional to 9.6 kg, 7.2 kg, 28.8 kg
Advertisements
Solution
Let fourth proportional to 9.6 kg, 7.2 kg, 28.8 kg be x
then 9.6 : 7.2 : : 28.8 : x
⇒ 9.6 × x = 7.2 x 28.8
x = `(7.2 xx 28.8)/(9.6)`
= 21.6.
APPEARS IN
RELATED QUESTIONS
If a/b = c/d prove that each of the given ratio is equal to `(13a - 8c)/(13b - 8d)`
If a/b = c/d prove that each of the given ratio is equal to `sqrt((3a^2 - 10c^2)/(3b^2 - 10d^2))`
Find the mean proportional of the following:
17.5, 0.007
What least number must be added to each of the numbers 16, 7, 79 and 43 so that the resulting
numbers are in proportion?
Find the value of the unknown in the following proportion :
3 : 4 : : p : 12
Find the fourth proportion to the following:
0.7, 4.9 and 1.6
Find the third proportion to the following :
3 and 15
Find the value of x in each of the following proportions:
51 : 85 : : 57 : x
Write True (T) or False (F) against the following statement:
12 : 18 : : 28 : 12
The first, third, and fourth terms of a proportion are 9, 24, and 32. Find the second term.
