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Finding the Fourth Proportional to 8,335.90, 12,481.98 and 5,405.32

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Solution

The fourth proportional to 8,335.90, 12,481.98 and 5,405.32 is: 8,093.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,335.90 : 12,481.98 = 5,405.32 : x
  2. Step 2: Convert to fraction form
    8,335.90/12,481.98 = 5,405.32/x
  3. Step 3: Cross multiply
    8,335.90x = 12,481.98 × 5,405.32
  4. Step 4: Simplify right side
    8,335.90x = 67,469,096.13
  5. Step 5: Solve for x
    x = 67,469,096.13/8,335.90
  6. Step 6: Final answer
    x = 8,093.80

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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.