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Finding the Fourth Proportional to 20,505.68, 30,764.10 and 6,654.68

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Solution

The fourth proportional to 20,505.68, 30,764.10 and 6,654.68 is: 9,983.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.68 : 30,764.10 = 6,654.68 : x
  2. Step 2: Convert to fraction form
    20,505.68/30,764.10 = 6,654.68/x
  3. Step 3: Cross multiply
    20,505.68x = 30,764.10 × 6,654.68
  4. Step 4: Simplify right side
    20,505.68x = 204,725,240.99
  5. Step 5: Solve for x
    x = 204,725,240.99/20,505.68
  6. Step 6: Final answer
    x = 9,983.83

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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.