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Finding the Fourth Proportional to 19,956.75, 29,940.21 and 5,917.29

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Solution

The fourth proportional to 19,956.75, 29,940.21 and 5,917.29 is: 8,877.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,956.75 : 29,940.21 = 5,917.29 : x
  2. Step 2: Convert to fraction form
    19,956.75/29,940.21 = 5,917.29/x
  3. Step 3: Cross multiply
    19,956.75x = 29,940.21 × 5,917.29
  4. Step 4: Simplify right side
    19,956.75x = 177,164,905.23
  5. Step 5: Solve for x
    x = 177,164,905.23/19,956.75
  6. Step 6: Final answer
    x = 8,877.44

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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.