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Finding the Fourth Proportional to 20,240.52, 30,361 and 7,092.88

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Solution

The fourth proportional to 20,240.52, 30,361 and 7,092.88 is: 10,639.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,240.52 : 30,361 = 7,092.88 : x
  2. Step 2: Convert to fraction form
    20,240.52/30,361 = 7,092.88/x
  3. Step 3: Cross multiply
    20,240.52x = 30,361 × 7,092.88
  4. Step 4: Simplify right side
    20,240.52x = 215,346,929.68
  5. Step 5: Solve for x
    x = 215,346,929.68/20,240.52
  6. Step 6: Final answer
    x = 10,639.40

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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.