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Finding the Fourth Proportional to 7,129.91, 10,694.84 and 3,863.75

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Solution

The fourth proportional to 7,129.91, 10,694.84 and 3,863.75 is: 5,795.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.91 : 10,694.84 = 3,863.75 : x
  2. Step 2: Convert to fraction form
    7,129.91/10,694.84 = 3,863.75/x
  3. Step 3: Cross multiply
    7,129.91x = 10,694.84 × 3,863.75
  4. Step 4: Simplify right side
    7,129.91x = 41,322,115.26
  5. Step 5: Solve for x
    x = 41,322,115.26/7,129.91
  6. Step 6: Final answer
    x = 5,795.61

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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.