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Finding the Fourth Proportional to 7,129.52, 10,642.07 and 6,287.85

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Solution

The fourth proportional to 7,129.52, 10,642.07 and 6,287.85 is: 9,385.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.52 : 10,642.07 = 6,287.85 : x
  2. Step 2: Convert to fraction form
    7,129.52/10,642.07 = 6,287.85/x
  3. Step 3: Cross multiply
    7,129.52x = 10,642.07 × 6,287.85
  4. Step 4: Simplify right side
    7,129.52x = 66,915,708.41
  5. Step 5: Solve for x
    x = 66,915,708.41/7,129.52
  6. Step 6: Final answer
    x = 9,385.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.