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Finding the Fourth Proportional to 19,911.65, 29,872.09 and 6,764.03

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Solution

The fourth proportional to 19,911.65, 29,872.09 and 6,764.03 is: 10,147.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,911.65 : 29,872.09 = 6,764.03 : x
  2. Step 2: Convert to fraction form
    19,911.65/29,872.09 = 6,764.03/x
  3. Step 3: Cross multiply
    19,911.65x = 29,872.09 × 6,764.03
  4. Step 4: Simplify right side
    19,911.65x = 202,055,712.92
  5. Step 5: Solve for x
    x = 202,055,712.92/19,911.65
  6. Step 6: Final answer
    x = 10,147.61

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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.