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Finding the Fourth Proportional to 19,956.69, 29,939.89 and 6,105.69

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Solution

The fourth proportional to 19,956.69, 29,939.89 and 6,105.69 is: 9,160.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,956.69 : 29,939.89 = 6,105.69 : x
  2. Step 2: Convert to fraction form
    19,956.69/29,939.89 = 6,105.69/x
  3. Step 3: Cross multiply
    19,956.69x = 29,939.89 × 6,105.69
  4. Step 4: Simplify right side
    19,956.69x = 182,803,686.97
  5. Step 5: Solve for x
    x = 182,803,686.97/19,956.69
  6. Step 6: Final answer
    x = 9,160.02

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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.