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Finding the Fourth Proportional to 6,680.99, 9,218.97 and 3,991.73

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Solution

The fourth proportional to 6,680.99, 9,218.97 and 3,991.73 is: 5,508.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,680.99 : 9,218.97 = 3,991.73 : x
  2. Step 2: Convert to fraction form
    6,680.99/9,218.97 = 3,991.73/x
  3. Step 3: Cross multiply
    6,680.99x = 9,218.97 × 3,991.73
  4. Step 4: Simplify right side
    6,680.99x = 36,799,639.12
  5. Step 5: Solve for x
    x = 36,799,639.12/6,680.99
  6. Step 6: Final answer
    x = 5,508.11

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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.