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Finding the Fourth Proportional to 15,424.43, 21,285.71 and 8,350.85

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Solution

The fourth proportional to 15,424.43, 21,285.71 and 8,350.85 is: 11,524.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,424.43 : 21,285.71 = 8,350.85 : x
  2. Step 2: Convert to fraction form
    15,424.43/21,285.71 = 8,350.85/x
  3. Step 3: Cross multiply
    15,424.43x = 21,285.71 × 8,350.85
  4. Step 4: Simplify right side
    15,424.43x = 177,753,845.44
  5. Step 5: Solve for x
    x = 177,753,845.44/15,424.43
  6. Step 6: Final answer
    x = 11,524.18

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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.