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Finding the Fourth Proportional to 20,503.28, 30,759.75 and 6,652.28

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Solution

The fourth proportional to 20,503.28, 30,759.75 and 6,652.28 is: 9,979.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,503.28 : 30,759.75 = 6,652.28 : x
  2. Step 2: Convert to fraction form
    20,503.28/30,759.75 = 6,652.28/x
  3. Step 3: Cross multiply
    20,503.28x = 30,759.75 × 6,652.28
  4. Step 4: Simplify right side
    20,503.28x = 204,622,469.73
  5. Step 5: Solve for x
    x = 204,622,469.73/20,503.28
  6. Step 6: Final answer
    x = 9,979.99

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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.