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Finding the Fourth Proportional to 7,990.52, 11,984.90 and 2,146.68

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Solution

The fourth proportional to 7,990.52, 11,984.90 and 2,146.68 is: 3,219.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.52 : 11,984.90 = 2,146.68 : x
  2. Step 2: Convert to fraction form
    7,990.52/11,984.90 = 2,146.68/x
  3. Step 3: Cross multiply
    7,990.52x = 11,984.90 × 2,146.68
  4. Step 4: Simplify right side
    7,990.52x = 25,727,745.13
  5. Step 5: Solve for x
    x = 25,727,745.13/7,990.52
  6. Step 6: Final answer
    x = 3,219.78

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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.