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Finding the Fourth Proportional to 17,279.25, 25,918.70 and 7,916.61

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Solution

The fourth proportional to 17,279.25, 25,918.70 and 7,916.61 is: 11,874.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,279.25 : 25,918.70 = 7,916.61 : x
  2. Step 2: Convert to fraction form
    17,279.25/25,918.70 = 7,916.61/x
  3. Step 3: Cross multiply
    17,279.25x = 25,918.70 × 7,916.61
  4. Step 4: Simplify right side
    17,279.25x = 205,188,239.61
  5. Step 5: Solve for x
    x = 205,188,239.61/17,279.25
  6. Step 6: Final answer
    x = 11,874.84

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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.