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Finding the Fourth Proportional to 40,381.88, 60,582.42 and 12,679.88

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Solution

The fourth proportional to 40,381.88, 60,582.42 and 12,679.88 is: 19,022.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,381.88 : 60,582.42 = 12,679.88 : x
  2. Step 2: Convert to fraction form
    40,381.88/60,582.42 = 12,679.88/x
  3. Step 3: Cross multiply
    40,381.88x = 60,582.42 × 12,679.88
  4. Step 4: Simplify right side
    40,381.88x = 768,177,815.71
  5. Step 5: Solve for x
    x = 768,177,815.71/40,381.88
  6. Step 6: Final answer
    x = 19,022.83

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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.