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Finding the Fourth Proportional to 17,168.20, 25,755.20 and 5,319.25

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Solution

The fourth proportional to 17,168.20, 25,755.20 and 5,319.25 is: 7,979.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,168.20 : 25,755.20 = 5,319.25 : x
  2. Step 2: Convert to fraction form
    17,168.20/25,755.20 = 5,319.25/x
  3. Step 3: Cross multiply
    17,168.20x = 25,755.20 × 5,319.25
  4. Step 4: Simplify right side
    17,168.20x = 136,998,347.60
  5. Step 5: Solve for x
    x = 136,998,347.60/17,168.20
  6. Step 6: Final answer
    x = 7,979.77

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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.