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Finding the Fourth Proportional to 15,472.11, 21,351.90 and 8,398.54

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Solution

The fourth proportional to 15,472.11, 21,351.90 and 8,398.54 is: 11,590.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,472.11 : 21,351.90 = 8,398.54 : x
  2. Step 2: Convert to fraction form
    15,472.11/21,351.90 = 8,398.54/x
  3. Step 3: Cross multiply
    15,472.11x = 21,351.90 × 8,398.54
  4. Step 4: Simplify right side
    15,472.11x = 179,324,724.31
  5. Step 5: Solve for x
    x = 179,324,724.31/15,472.11
  6. Step 6: Final answer
    x = 11,590.19

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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.