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Finding the Fourth Proportional to 17,318.85, 25,978.23 and 4,171.20

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Solution

The fourth proportional to 17,318.85, 25,978.23 and 4,171.20 is: 6,256.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,318.85 : 25,978.23 = 4,171.20 : x
  2. Step 2: Convert to fraction form
    17,318.85/25,978.23 = 4,171.20/x
  3. Step 3: Cross multiply
    17,318.85x = 25,978.23 × 4,171.20
  4. Step 4: Simplify right side
    17,318.85x = 108,360,392.98
  5. Step 5: Solve for x
    x = 108,360,392.98/17,318.85
  6. Step 6: Final answer
    x = 6,256.79

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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.