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Finding the Fourth Proportional to 8,169.60, 12,260.80 and 3,787.60

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Solution

The fourth proportional to 8,169.60, 12,260.80 and 3,787.60 is: 5,684.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,169.60 : 12,260.80 = 3,787.60 : x
  2. Step 2: Convert to fraction form
    8,169.60/12,260.80 = 3,787.60/x
  3. Step 3: Cross multiply
    8,169.60x = 12,260.80 × 3,787.60
  4. Step 4: Simplify right side
    8,169.60x = 46,439,006.08
  5. Step 5: Solve for x
    x = 46,439,006.08/8,169.60
  6. Step 6: Final answer
    x = 5,684.37

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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.