Question

9,12 & x are in continued proportion. Find the value of x

Answer 1

Answer:

Solution:

Solution:25, 35 and x are in continued proportion

Solution:25, 35 and x are in continued proportion\Rightarrow⇒ 25 : 35 = 35 : x

Solution:25, 35 and x are in continued proportion\Rightarrow⇒ 25 : 35 = 35 : x\Rightarrow\ 25\times x=35\times35⇒ 25×x=35×35

Solution:25, 35 and x are in continued proportion\Rightarrow⇒ 25 : 35 = 35 : x\Rightarrow\ 25\times x=35\times35⇒ 25×x=35×35x=\frac{35\times35}{25}x=

Solution:25, 35 and x are in continued proportion\Rightarrow⇒ 25 : 35 = 35 : x\Rightarrow\ 25\times x=35\times35⇒ 25×x=35×35x=\frac{35\times35}{25}x= 25

Solution:25, 35 and x are in continued proportion\Rightarrow⇒ 25 : 35 = 35 : x\Rightarrow\ 25\times x=35\times35⇒ 25×x=35×35x=\frac{35\times35}{25}x= 2535×35

Solution:25, 35 and x are in continued proportion\Rightarrow⇒ 25 : 35 = 35 : x\Rightarrow\ 25\times x=35\times35⇒ 25×x=35×35x=\frac{35\times35}{25}x= 2535×35

Solution:25, 35 and x are in continued proportion\Rightarrow⇒ 25 : 35 = 35 : x\Rightarrow\ 25\times x=35\times35⇒ 25×x=35×35x=\frac{35\times35}{25}x= 2535×35

Solution:25, 35 and x are in continued proportion\Rightarrow⇒ 25 : 35 = 35 : x\Rightarrow\ 25\times x=35\times35⇒ 25×x=35×35x=\frac{35\times35}{25}x= 2535×35 \Rightarrow⇒ x= 49

Answer 2

Answer:

• a=9,b=12,c=x
• a=9,b=12,c=xa\b=b\c
• a=9,b=12,c=xa\b=b\c9\12=12\x
• a=9,b=12,c=xa\b=b\c9\12=12\xby cross multiplication
• a=9,b=12,c=xa\b=b\c9\12=12\xby cross multiplication9x=144
• a=9,b=12,c=xa\b=b\c9\12=12\xby cross multiplication9x=144x=144\9
• a=9,b=12,c=xa\b=b\c9\12=12\xby cross multiplication9x=144x=144\9x=16