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Finding the Fourth Proportional to 40,239.84, 60,365.52 and 12,540

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Solution

The fourth proportional to 40,239.84, 60,365.52 and 12,540 is: 18,811.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,239.84 : 60,365.52 = 12,540 : x
  2. Step 2: Convert to fraction form
    40,239.84/60,365.52 = 12,540/x
  3. Step 3: Cross multiply
    40,239.84x = 60,365.52 × 12,540
  4. Step 4: Simplify right side
    40,239.84x = 756,983,620.80
  5. Step 5: Solve for x
    x = 756,983,620.80/40,239.84
  6. Step 6: Final answer
    x = 18,811.79

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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.