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Finding the Fourth Proportional to 6,761.52, 9,331.18 and 3,928.86

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Solution

The fourth proportional to 6,761.52, 9,331.18 and 3,928.86 is: 5,421.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,761.52 : 9,331.18 = 3,928.86 : x
  2. Step 2: Convert to fraction form
    6,761.52/9,331.18 = 3,928.86/x
  3. Step 3: Cross multiply
    6,761.52x = 9,331.18 × 3,928.86
  4. Step 4: Simplify right side
    6,761.52x = 36,660,899.85
  5. Step 5: Solve for x
    x = 36,660,899.85/6,761.52
  6. Step 6: Final answer
    x = 5,421.99

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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.