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Finding the Fourth Proportional to 40,089.68, 60,134.88 and 12,387.68

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Solution

The fourth proportional to 40,089.68, 60,134.88 and 12,387.68 is: 18,581.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,089.68 : 60,134.88 = 12,387.68 : x
  2. Step 2: Convert to fraction form
    40,089.68/60,134.88 = 12,387.68/x
  3. Step 3: Cross multiply
    40,089.68x = 60,134.88 × 12,387.68
  4. Step 4: Simplify right side
    40,089.68x = 744,931,650.28
  5. Step 5: Solve for x
    x = 744,931,650.28/40,089.68
  6. Step 6: Final answer
    x = 18,581.63

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1.5x scale

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.