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Finding the Fourth Proportional to 40,387.64, 60,591.04 and 12,685.64

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Solution

The fourth proportional to 40,387.64, 60,591.04 and 12,685.64 is: 19,031.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,387.64 : 60,591.04 = 12,685.64 : x
  2. Step 2: Convert to fraction form
    40,387.64/60,591.04 = 12,685.64/x
  3. Step 3: Cross multiply
    40,387.64x = 60,591.04 × 12,685.64
  4. Step 4: Simplify right side
    40,387.64x = 768,636,120.67
  5. Step 5: Solve for x
    x = 768,636,120.67/40,387.64
  6. Step 6: Final answer
    x = 19,031.47

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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.