Home / 31,806-47,709-9,918

Finding the Fourth Proportional to 31,806, 47,709 and 9,918

Calculator

Solution

The fourth proportional to 31,806, 47,709 and 9,918 is: 14,877

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,806 : 47,709 = 9,918 : x
  2. Step 2: Convert to fraction form
    31,806/47,709 = 9,918/x
  3. Step 3: Cross multiply
    31,806x = 47,709 × 9,918
  4. Step 4: Simplify right side
    31,806x = 473,177,862
  5. Step 5: Solve for x
    x = 473,177,862/31,806
  6. Step 6: Final answer
    x = 14,877

Related Problems

Find fourth proportional to 15,903, 23,854.50 and 4,959
Half scale
Find fourth proportional to 63,612, 95,418 and 19,836
Double scale
Find fourth proportional to 31,807, 47,710.50 and 9,919
Similar ratio
Find fourth proportional to 47,709, 71,563.50 and 14,877
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.