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Finding the Fourth Proportional to 6,139.12, 8,472 and 3,344.80

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Solution

The fourth proportional to 6,139.12, 8,472 and 3,344.80 is: 4,615.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,139.12 : 8,472 = 3,344.80 : x
  2. Step 2: Convert to fraction form
    6,139.12/8,472 = 3,344.80/x
  3. Step 3: Cross multiply
    6,139.12x = 8,472 × 3,344.80
  4. Step 4: Simplify right side
    6,139.12x = 28,337,145.60
  5. Step 5: Solve for x
    x = 28,337,145.60/6,139.12
  6. Step 6: Final answer
    x = 4,615.83

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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.