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Finding the Fourth Proportional to 39,956.80, 59,935.20 and 12,251.20

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Solution

The fourth proportional to 39,956.80, 59,935.20 and 12,251.20 is: 18,376.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,956.80 : 59,935.20 = 12,251.20 : x
  2. Step 2: Convert to fraction form
    39,956.80/59,935.20 = 12,251.20/x
  3. Step 3: Cross multiply
    39,956.80x = 59,935.20 × 12,251.20
  4. Step 4: Simplify right side
    39,956.80x = 734,278,122.24
  5. Step 5: Solve for x
    x = 734,278,122.24/39,956.80
  6. Step 6: Final answer
    x = 18,376.80

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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.