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Finding the Fourth Proportional to 21,273.92, 29,354.56 and 11,842.24

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Solution

The fourth proportional to 21,273.92, 29,354.56 and 11,842.24 is: 16,340.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.92 : 29,354.56 = 11,842.24 : x
  2. Step 2: Convert to fraction form
    21,273.92/29,354.56 = 11,842.24/x
  3. Step 3: Cross multiply
    21,273.92x = 29,354.56 × 11,842.24
  4. Step 4: Simplify right side
    21,273.92x = 347,623,744.61
  5. Step 5: Solve for x
    x = 347,623,744.61/21,273.92
  6. Step 6: Final answer
    x = 16,340.37

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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.