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Finding the Fourth Proportional to 6,129.52, 8,458.22 and 4,142.80

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Solution

The fourth proportional to 6,129.52, 8,458.22 and 4,142.80 is: 5,716.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,129.52 : 8,458.22 = 4,142.80 : x
  2. Step 2: Convert to fraction form
    6,129.52/8,458.22 = 4,142.80/x
  3. Step 3: Cross multiply
    6,129.52x = 8,458.22 × 4,142.80
  4. Step 4: Simplify right side
    6,129.52x = 35,040,713.82
  5. Step 5: Solve for x
    x = 35,040,713.82/6,129.52
  6. Step 6: Final answer
    x = 5,716.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.