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Finding the Fourth Proportional to 12,910.11, 17,821.41 and 8,724.03

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Solution

The fourth proportional to 12,910.11, 17,821.41 and 8,724.03 is: 12,042.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,910.11 : 17,821.41 = 8,724.03 : x
  2. Step 2: Convert to fraction form
    12,910.11/17,821.41 = 8,724.03/x
  3. Step 3: Cross multiply
    12,910.11x = 17,821.41 × 8,724.03
  4. Step 4: Simplify right side
    12,910.11x = 155,474,515.48
  5. Step 5: Solve for x
    x = 155,474,515.48/12,910.11
  6. Step 6: Final answer
    x = 12,042.85

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1.5x scale

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.