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Finding the Fourth Proportional to 7,687.56, 11,532.55 and 2,691.33

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Solution

The fourth proportional to 7,687.56, 11,532.55 and 2,691.33 is: 4,037.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,687.56 : 11,532.55 = 2,691.33 : x
  2. Step 2: Convert to fraction form
    7,687.56/11,532.55 = 2,691.33/x
  3. Step 3: Cross multiply
    7,687.56x = 11,532.55 × 2,691.33
  4. Step 4: Simplify right side
    7,687.56x = 31,037,897.79
  5. Step 5: Solve for x
    x = 31,037,897.79/7,687.56
  6. Step 6: Final answer
    x = 4,037.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.