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Finding the Fourth Proportional to 20,486.98, 30,730.17 and 6,635.98

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Solution

The fourth proportional to 20,486.98, 30,730.17 and 6,635.98 is: 9,953.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.98 : 30,730.17 = 6,635.98 : x
  2. Step 2: Convert to fraction form
    20,486.98/30,730.17 = 6,635.98/x
  3. Step 3: Cross multiply
    20,486.98x = 30,730.17 × 6,635.98
  4. Step 4: Simplify right side
    20,486.98x = 203,924,793.52
  5. Step 5: Solve for x
    x = 203,924,793.52/20,486.98
  6. Step 6: Final answer
    x = 9,953.87

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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.