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Finding the Fourth Proportional to 6,656.70, 9,991.17 and 3,372.09

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Solution

The fourth proportional to 6,656.70, 9,991.17 and 3,372.09 is: 5,061.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,656.70 : 9,991.17 = 3,372.09 : x
  2. Step 2: Convert to fraction form
    6,656.70/9,991.17 = 3,372.09/x
  3. Step 3: Cross multiply
    6,656.70x = 9,991.17 × 3,372.09
  4. Step 4: Simplify right side
    6,656.70x = 33,691,124.45
  5. Step 5: Solve for x
    x = 33,691,124.45/6,656.70
  6. Step 6: Final answer
    x = 5,061.24

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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.