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Finding the Fourth Proportional to 21,387.76, 32,071.92 and 6,593.92

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Solution

The fourth proportional to 21,387.76, 32,071.92 and 6,593.92 is: 9,887.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,387.76 : 32,071.92 = 6,593.92 : x
  2. Step 2: Convert to fraction form
    21,387.76/32,071.92 = 6,593.92/x
  3. Step 3: Cross multiply
    21,387.76x = 32,071.92 × 6,593.92
  4. Step 4: Simplify right side
    21,387.76x = 211,479,674.73
  5. Step 5: Solve for x
    x = 211,479,674.73/21,387.76
  6. Step 6: Final answer
    x = 9,887.88

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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.