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Finding the Fourth Proportional to 20,654.64, 30,993.28 and 8,967.92

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Solution

The fourth proportional to 20,654.64, 30,993.28 and 8,967.92 is: 13,456.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,654.64 : 30,993.28 = 8,967.92 : x
  2. Step 2: Convert to fraction form
    20,654.64/30,993.28 = 8,967.92/x
  3. Step 3: Cross multiply
    20,654.64x = 30,993.28 × 8,967.92
  4. Step 4: Simplify right side
    20,654.64x = 277,945,255.58
  5. Step 5: Solve for x
    x = 277,945,255.58/20,654.64
  6. Step 6: Final answer
    x = 13,456.79

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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.