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Finding the Fourth Proportional to 19,890.29, 27,447.90 and 10,937.73

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Solution

The fourth proportional to 19,890.29, 27,447.90 and 10,937.73 is: 15,093.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,890.29 : 27,447.90 = 10,937.73 : x
  2. Step 2: Convert to fraction form
    19,890.29/27,447.90 = 10,937.73/x
  3. Step 3: Cross multiply
    19,890.29x = 27,447.90 × 10,937.73
  4. Step 4: Simplify right side
    19,890.29x = 300,217,781.18
  5. Step 5: Solve for x
    x = 300,217,781.18/19,890.29
  6. Step 6: Final answer
    x = 15,093.68

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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.