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Finding the Fourth Proportional to 17,292.87, 25,905.15 and 8,978.31

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Solution

The fourth proportional to 17,292.87, 25,905.15 and 8,978.31 is: 13,449.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,292.87 : 25,905.15 = 8,978.31 : x
  2. Step 2: Convert to fraction form
    17,292.87/25,905.15 = 8,978.31/x
  3. Step 3: Cross multiply
    17,292.87x = 25,905.15 × 8,978.31
  4. Step 4: Simplify right side
    17,292.87x = 232,584,467.30
  5. Step 5: Solve for x
    x = 232,584,467.30/17,292.87
  6. Step 6: Final answer
    x = 13,449.73

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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.