Home / 7,920.12-11,882.86-2,991.18

Finding the Fourth Proportional to 7,920.12, 11,882.86 and 2,991.18

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Solution

The fourth proportional to 7,920.12, 11,882.86 and 2,991.18 is: 4,487.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,920.12 : 11,882.86 = 2,991.18 : x
  2. Step 2: Convert to fraction form
    7,920.12/11,882.86 = 2,991.18/x
  3. Step 3: Cross multiply
    7,920.12x = 11,882.86 × 2,991.18
  4. Step 4: Simplify right side
    7,920.12x = 35,543,773.17
  5. Step 5: Solve for x
    x = 35,543,773.17/7,920.12
  6. Step 6: Final answer
    x = 4,487.78

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.