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Finding the Fourth Proportional to 17,321.94, 25,979.18 and 5,476.64

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Solution

The fourth proportional to 17,321.94, 25,979.18 and 5,476.64 is: 8,213.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,321.94 : 25,979.18 = 5,476.64 : x
  2. Step 2: Convert to fraction form
    17,321.94/25,979.18 = 5,476.64/x
  3. Step 3: Cross multiply
    17,321.94x = 25,979.18 × 5,476.64
  4. Step 4: Simplify right side
    17,321.94x = 142,278,616.36
  5. Step 5: Solve for x
    x = 142,278,616.36/17,321.94
  6. Step 6: Final answer
    x = 8,213.78

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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.