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Find the value of if 3 : x :: 12 : 20. Find the value of x?
  1. 4
  2. 5
  3. 6
  4. 7
Explanation

To solve this proportion, we can use the following steps:

Write the proportion as a fraction: 3/x = 12/20

Cross-multiply: 3 × 20 = 12 × x

Simplify: 60 = 12x

Divide both sides by 12: x = 60/12

Simplify: x = 5

So, the value of x is 5.

Related MCQs

For an MCQ, the proportion correct is 0.70 in the upper group and 0.55 in the lower group. Using D = p_u - p_l, what is the discrimination index?
ایک MCQ کے لیے، اوپری گروپ میں درست کا تناسب 0.70 اور نچلے گروپ میں 0.55 ہے۔ D = p_u - p_l کا استعمال کرتے ہوئے، امتیاز انڈیکس کیا ہے
  1. +0.15
  2. -0.15
  3. +0.85
  4. -0.85
اس سوال کو وضاحت کے ساتھ پڑھیں
The principal and operation accounts are in the ratio of 7:5. If Rs. 90,000 is transferred from the principal account to the operation account, the ratio becomes 5:4. What was the original amount in the principal account?
  1. Rs. 1,891,000
  2. Rs. 1,892,000
  3. Rs. 1,890,000
  4. None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
What is a ratio?
تناسب کیا ہے؟
  1. The sum of two quantities
  2. The comparison of two quantities
  3. The difference between two quantities
  4. None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
In the Mathematics department of a certain university, the student teacher ratio was 20:1. It was decided to increase the number of students and teachers by 50% and 10% respectively. The new student to teacher ratio is?
  1. 30:1
  2. 300:11
  3. 25:1
  4. None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
The ratio of male and female students in a class is 27:23. If the difference between the number of male and female students is 200, then the number of female students is?
  1. 1150
  2. 1350
  3. 1550
  4. None of these
اس سوال کو وضاحت کے ساتھ پڑھیں
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