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Finding the Fourth Proportional to 21,773.76, 30,001.20 and 14,687.76

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Solution

The fourth proportional to 21,773.76, 30,001.20 and 14,687.76 is: 20,237.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,773.76 : 30,001.20 = 14,687.76 : x
  2. Step 2: Convert to fraction form
    21,773.76/30,001.20 = 14,687.76/x
  3. Step 3: Cross multiply
    21,773.76x = 30,001.20 × 14,687.76
  4. Step 4: Simplify right side
    21,773.76x = 440,650,425.31
  5. Step 5: Solve for x
    x = 440,650,425.31/21,773.76
  6. Step 6: Final answer
    x = 20,237.68

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1.5x scale

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.