Home / 21,610.38-29,781.60-15,631.90

Finding the Fourth Proportional to 21,610.38, 29,781.60 and 15,631.90

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Solution

The fourth proportional to 21,610.38, 29,781.60 and 15,631.90 is: 21,542.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,610.38 : 29,781.60 = 15,631.90 : x
  2. Step 2: Convert to fraction form
    21,610.38/29,781.60 = 15,631.90/x
  3. Step 3: Cross multiply
    21,610.38x = 29,781.60 × 15,631.90
  4. Step 4: Simplify right side
    21,610.38x = 465,542,993.04
  5. Step 5: Solve for x
    x = 465,542,993.04/21,610.38
  6. Step 6: Final answer
    x = 21,542.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.