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Finding the Fourth Proportional to 17,166.90, 25,766.55 and 10,605.90

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Solution

The fourth proportional to 17,166.90, 25,766.55 and 10,605.90 is: 15,918.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,166.90 : 25,766.55 = 10,605.90 : x
  2. Step 2: Convert to fraction form
    17,166.90/25,766.55 = 10,605.90/x
  3. Step 3: Cross multiply
    17,166.90x = 25,766.55 × 10,605.90
  4. Step 4: Simplify right side
    17,166.90x = 273,277,452.65
  5. Step 5: Solve for x
    x = 273,277,452.65/17,166.90
  6. Step 6: Final answer
    x = 15,918.86

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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.