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Finding the Fourth Proportional to 40,981.80, 61,472.70 and 14,687.40

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Solution

The fourth proportional to 40,981.80, 61,472.70 and 14,687.40 is: 22,031.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,981.80 : 61,472.70 = 14,687.40 : x
  2. Step 2: Convert to fraction form
    40,981.80/61,472.70 = 14,687.40/x
  3. Step 3: Cross multiply
    40,981.80x = 61,472.70 × 14,687.40
  4. Step 4: Simplify right side
    40,981.80x = 902,874,133.98
  5. Step 5: Solve for x
    x = 902,874,133.98/40,981.80
  6. Step 6: Final answer
    x = 22,031.10

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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.