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Finding the Fourth Proportional to 8,340.75, 12,511.13 and 3,955.82

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Solution

The fourth proportional to 8,340.75, 12,511.13 and 3,955.82 is: 5,933.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,340.75 : 12,511.13 = 3,955.82 : x
  2. Step 2: Convert to fraction form
    8,340.75/12,511.13 = 3,955.82/x
  3. Step 3: Cross multiply
    8,340.75x = 12,511.13 × 3,955.82
  4. Step 4: Simplify right side
    8,340.75x = 49,491,778.28
  5. Step 5: Solve for x
    x = 49,491,778.28/8,340.75
  6. Step 6: Final answer
    x = 5,933.73

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Double scale
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Similar ratio
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1.5x scale

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.