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Finding the Fourth Proportional to 8,335.71, 12,505.39 and 3,405.85

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Solution

The fourth proportional to 8,335.71, 12,505.39 and 3,405.85 is: 5,109.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,335.71 : 12,505.39 = 3,405.85 : x
  2. Step 2: Convert to fraction form
    8,335.71/12,505.39 = 3,405.85/x
  3. Step 3: Cross multiply
    8,335.71x = 12,505.39 × 3,405.85
  4. Step 4: Simplify right side
    8,335.71x = 42,591,442.75
  5. Step 5: Solve for x
    x = 42,591,442.75/8,335.71
  6. Step 6: Final answer
    x = 5,109.52

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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.