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Finding the Fourth Proportional to 6,616.60, 9,915.90 and 3,331.96

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Solution

The fourth proportional to 6,616.60, 9,915.90 and 3,331.96 is: 4,993.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,616.60 : 9,915.90 = 3,331.96 : x
  2. Step 2: Convert to fraction form
    6,616.60/9,915.90 = 3,331.96/x
  3. Step 3: Cross multiply
    6,616.60x = 9,915.90 × 3,331.96
  4. Step 4: Simplify right side
    6,616.60x = 33,039,382.16
  5. Step 5: Solve for x
    x = 33,039,382.16/6,616.60
  6. Step 6: Final answer
    x = 4,993.41

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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.