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Finding the Fourth Proportional to 40,630.68, 60,909.12 and 18,431.98

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Solution

The fourth proportional to 40,630.68, 60,909.12 and 18,431.98 is: 27,631.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,630.68 : 60,909.12 = 18,431.98 : x
  2. Step 2: Convert to fraction form
    40,630.68/60,909.12 = 18,431.98/x
  3. Step 3: Cross multiply
    40,630.68x = 60,909.12 × 18,431.98
  4. Step 4: Simplify right side
    40,630.68x = 1,122,675,529.38
  5. Step 5: Solve for x
    x = 1,122,675,529.38/40,630.68
  6. Step 6: Final answer
    x = 27,631.22

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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.