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Finding the Fourth Proportional to 17,087.90, 25,635.90 and 8,769.20

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Solution

The fourth proportional to 17,087.90, 25,635.90 and 8,769.20 is: 13,155.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,087.90 : 25,635.90 = 8,769.20 : x
  2. Step 2: Convert to fraction form
    17,087.90/25,635.90 = 8,769.20/x
  3. Step 3: Cross multiply
    17,087.90x = 25,635.90 × 8,769.20
  4. Step 4: Simplify right side
    17,087.90x = 224,806,334.28
  5. Step 5: Solve for x
    x = 224,806,334.28/17,087.90
  6. Step 6: Final answer
    x = 13,155.88

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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.