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Finding the Fourth Proportional to 19,911.87, 29,872.67 and 6,060.87

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Solution

The fourth proportional to 19,911.87, 29,872.67 and 6,060.87 is: 9,092.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,911.87 : 29,872.67 = 6,060.87 : x
  2. Step 2: Convert to fraction form
    19,911.87/29,872.67 = 6,060.87/x
  3. Step 3: Cross multiply
    19,911.87x = 29,872.67 × 6,060.87
  4. Step 4: Simplify right side
    19,911.87x = 181,054,339.12
  5. Step 5: Solve for x
    x = 181,054,339.12/19,911.87
  6. Step 6: Final answer
    x = 9,092.78

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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.