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Finding the Fourth Proportional to 11,129.69, 15,356.43 and 6,652.68

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Solution

The fourth proportional to 11,129.69, 15,356.43 and 6,652.68 is: 9,179.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,129.69 : 15,356.43 = 6,652.68 : x
  2. Step 2: Convert to fraction form
    11,129.69/15,356.43 = 6,652.68/x
  3. Step 3: Cross multiply
    11,129.69x = 15,356.43 × 6,652.68
  4. Step 4: Simplify right side
    11,129.69x = 102,161,414.73
  5. Step 5: Solve for x
    x = 102,161,414.73/11,129.69
  6. Step 6: Final answer
    x = 9,179.18

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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.