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Finding the Fourth Proportional to 8,326.92, 12,480.96 and 3,390.36

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Solution

The fourth proportional to 8,326.92, 12,480.96 and 3,390.36 is: 5,081.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,326.92 : 12,480.96 = 3,390.36 : x
  2. Step 2: Convert to fraction form
    8,326.92/12,480.96 = 3,390.36/x
  3. Step 3: Cross multiply
    8,326.92x = 12,480.96 × 3,390.36
  4. Step 4: Simplify right side
    8,326.92x = 42,314,947.55
  5. Step 5: Solve for x
    x = 42,314,947.55/8,326.92
  6. Step 6: Final answer
    x = 5,081.70

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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.