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Finding the Fourth Proportional to 20,617.71, 30,916.17 and 14,691.21

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Solution

The fourth proportional to 20,617.71, 30,916.17 and 14,691.21 is: 22,029.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,617.71 : 30,916.17 = 14,691.21 : x
  2. Step 2: Convert to fraction form
    20,617.71/30,916.17 = 14,691.21/x
  3. Step 3: Cross multiply
    20,617.71x = 30,916.17 × 14,691.21
  4. Step 4: Simplify right side
    20,617.71x = 454,195,945.87
  5. Step 5: Solve for x
    x = 454,195,945.87/20,617.71
  6. Step 6: Final answer
    x = 22,029.41

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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.