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Finding the Fourth Proportional to 7,235.88, 10,847.42 and 3,129.64

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Solution

The fourth proportional to 7,235.88, 10,847.42 and 3,129.64 is: 4,691.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,235.88 : 10,847.42 = 3,129.64 : x
  2. Step 2: Convert to fraction form
    7,235.88/10,847.42 = 3,129.64/x
  3. Step 3: Cross multiply
    7,235.88x = 10,847.42 × 3,129.64
  4. Step 4: Simplify right side
    7,235.88x = 33,948,519.53
  5. Step 5: Solve for x
    x = 33,948,519.53/7,235.88
  6. Step 6: Final answer
    x = 4,691.69

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1.5x scale

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.