Home / 25,432.76-38,144.10-20,531

Finding the Fourth Proportional to 25,432.76, 38,144.10 and 20,531

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Solution

The fourth proportional to 25,432.76, 38,144.10 and 20,531 is: 30,792.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,432.76 : 38,144.10 = 20,531 : x
  2. Step 2: Convert to fraction form
    25,432.76/38,144.10 = 20,531/x
  3. Step 3: Cross multiply
    25,432.76x = 38,144.10 × 20,531
  4. Step 4: Simplify right side
    25,432.76x = 783,136,517.10
  5. Step 5: Solve for x
    x = 783,136,517.10/25,432.76
  6. Step 6: Final answer
    x = 30,792.43

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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.