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Finding the Fourth Proportional to 41,981.72, 62,957.88 and 12,391.68

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Solution

The fourth proportional to 41,981.72, 62,957.88 and 12,391.68 is: 18,583.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    41,981.72 : 62,957.88 = 12,391.68 : x
  2. Step 2: Convert to fraction form
    41,981.72/62,957.88 = 12,391.68/x
  3. Step 3: Cross multiply
    41,981.72x = 62,957.88 × 12,391.68
  4. Step 4: Simplify right side
    41,981.72x = 780,153,902.44
  5. Step 5: Solve for x
    x = 780,153,902.44/41,981.72
  6. Step 6: Final answer
    x = 18,583.18

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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.