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Finding the Fourth Proportional to 8,157.80, 12,229.32 and 2,960

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Solution

The fourth proportional to 8,157.80, 12,229.32 and 2,960 is: 4,437.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,157.80 : 12,229.32 = 2,960 : x
  2. Step 2: Convert to fraction form
    8,157.80/12,229.32 = 2,960/x
  3. Step 3: Cross multiply
    8,157.80x = 12,229.32 × 2,960
  4. Step 4: Simplify right side
    8,157.80x = 36,198,787.20
  5. Step 5: Solve for x
    x = 36,198,787.20/8,157.80
  6. Step 6: Final answer
    x = 4,437.32

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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.