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Finding the Fourth Proportional to 11,373.20, 17,072.60 and 8,787.60

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Solution

The fourth proportional to 11,373.20, 17,072.60 and 8,787.60 is: 13,191.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,373.20 : 17,072.60 = 8,787.60 : x
  2. Step 2: Convert to fraction form
    11,373.20/17,072.60 = 8,787.60/x
  3. Step 3: Cross multiply
    11,373.20x = 17,072.60 × 8,787.60
  4. Step 4: Simplify right side
    11,373.20x = 150,027,179.76
  5. Step 5: Solve for x
    x = 150,027,179.76/11,373.20
  6. Step 6: Final answer
    x = 13,191.29

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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.