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Finding the Fourth Proportional to 13,623.72, 18,794.38 and 7,958.71

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Solution

The fourth proportional to 13,623.72, 18,794.38 and 7,958.71 is: 10,979.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,623.72 : 18,794.38 = 7,958.71 : x
  2. Step 2: Convert to fraction form
    13,623.72/18,794.38 = 7,958.71/x
  3. Step 3: Cross multiply
    13,623.72x = 18,794.38 × 7,958.71
  4. Step 4: Simplify right side
    13,623.72x = 149,578,932.85
  5. Step 5: Solve for x
    x = 149,578,932.85/13,623.72
  6. Step 6: Final answer
    x = 10,979.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.