Home / 11,986.20-16,540.97-6,680.90

Finding the Fourth Proportional to 11,986.20, 16,540.97 and 6,680.90

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Solution

The fourth proportional to 11,986.20, 16,540.97 and 6,680.90 is: 9,219.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,986.20 : 16,540.97 = 6,680.90 : x
  2. Step 2: Convert to fraction form
    11,986.20/16,540.97 = 6,680.90/x
  3. Step 3: Cross multiply
    11,986.20x = 16,540.97 × 6,680.90
  4. Step 4: Simplify right side
    11,986.20x = 110,508,566.47
  5. Step 5: Solve for x
    x = 110,508,566.47/11,986.20
  6. Step 6: Final answer
    x = 9,219.65

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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.