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Finding the Fourth Proportional to 21,892.44, 30,179.88 and 15,167.82

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Solution

The fourth proportional to 21,892.44, 30,179.88 and 15,167.82 is: 20,909.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,892.44 : 30,179.88 = 15,167.82 : x
  2. Step 2: Convert to fraction form
    21,892.44/30,179.88 = 15,167.82/x
  3. Step 3: Cross multiply
    21,892.44x = 30,179.88 × 15,167.82
  4. Step 4: Simplify right side
    21,892.44x = 457,762,987.46
  5. Step 5: Solve for x
    x = 457,762,987.46/21,892.44
  6. Step 6: Final answer
    x = 20,909.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.