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Finding the Fourth Proportional to 51,658.61, 77,487.92 and 20,493.86

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Solution

The fourth proportional to 51,658.61, 77,487.92 and 20,493.86 is: 30,740.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,658.61 : 77,487.92 = 20,493.86 : x
  2. Step 2: Convert to fraction form
    51,658.61/77,487.92 = 20,493.86/x
  3. Step 3: Cross multiply
    51,658.61x = 77,487.92 × 20,493.86
  4. Step 4: Simplify right side
    51,658.61x = 1,588,026,481.70
  5. Step 5: Solve for x
    x = 1,588,026,481.70/51,658.61
  6. Step 6: Final answer
    x = 30,740.79

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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.