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Finding the Fourth Proportional to 21,104.13, 29,123.34 and 11,672.69

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Solution

The fourth proportional to 21,104.13, 29,123.34 and 11,672.69 is: 16,108.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,104.13 : 29,123.34 = 11,672.69 : x
  2. Step 2: Convert to fraction form
    21,104.13/29,123.34 = 11,672.69/x
  3. Step 3: Cross multiply
    21,104.13x = 29,123.34 × 11,672.69
  4. Step 4: Simplify right side
    21,104.13x = 339,947,573.97
  5. Step 5: Solve for x
    x = 339,947,573.97/21,104.13
  6. Step 6: Final answer
    x = 16,108.11

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