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Finding the Fourth Proportional to 11,310.78, 15,608.88 and 6,342.78

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Solution

The fourth proportional to 11,310.78, 15,608.88 and 6,342.78 is: 8,753.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,310.78 : 15,608.88 = 6,342.78 : x
  2. Step 2: Convert to fraction form
    11,310.78/15,608.88 = 6,342.78/x
  3. Step 3: Cross multiply
    11,310.78x = 15,608.88 × 6,342.78
  4. Step 4: Simplify right side
    11,310.78x = 99,003,691.89
  5. Step 5: Solve for x
    x = 99,003,691.89/11,310.78
  6. Step 6: Final answer
    x = 8,753.04

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1.5x scale

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.