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Finding the Fourth Proportional to 15,744.26, 21,724.87 and 8,671.15

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Solution

The fourth proportional to 15,744.26, 21,724.87 and 8,671.15 is: 11,964.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,744.26 : 21,724.87 = 8,671.15 : x
  2. Step 2: Convert to fraction form
    15,744.26/21,724.87 = 8,671.15/x
  3. Step 3: Cross multiply
    15,744.26x = 21,724.87 × 8,671.15
  4. Step 4: Simplify right side
    15,744.26x = 188,379,606.50
  5. Step 5: Solve for x
    x = 188,379,606.50/15,744.26
  6. Step 6: Final answer
    x = 11,964.97

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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.