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Finding the Fourth Proportional to 17,072.80, 25,609.20 and 11,167.90

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Solution

The fourth proportional to 17,072.80, 25,609.20 and 11,167.90 is: 16,751.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,072.80 : 25,609.20 = 11,167.90 : x
  2. Step 2: Convert to fraction form
    17,072.80/25,609.20 = 11,167.90/x
  3. Step 3: Cross multiply
    17,072.80x = 25,609.20 × 11,167.90
  4. Step 4: Simplify right side
    17,072.80x = 286,000,984.68
  5. Step 5: Solve for x
    x = 286,000,984.68/17,072.80
  6. Step 6: Final answer
    x = 16,751.85

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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.