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Finding the Fourth Proportional to 19,198.72, 28,799.64 and 5,874.64

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Solution

The fourth proportional to 19,198.72, 28,799.64 and 5,874.64 is: 8,812.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,198.72 : 28,799.64 = 5,874.64 : x
  2. Step 2: Convert to fraction form
    19,198.72/28,799.64 = 5,874.64/x
  3. Step 3: Cross multiply
    19,198.72x = 28,799.64 × 5,874.64
  4. Step 4: Simplify right side
    19,198.72x = 169,187,517.13
  5. Step 5: Solve for x
    x = 169,187,517.13/19,198.72
  6. Step 6: Final answer
    x = 8,812.44

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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.