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Finding the Fourth Proportional to 7,959.78, 11,939.67 and 2,765.25

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Solution

The fourth proportional to 7,959.78, 11,939.67 and 2,765.25 is: 4,147.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.78 : 11,939.67 = 2,765.25 : x
  2. Step 2: Convert to fraction form
    7,959.78/11,939.67 = 2,765.25/x
  3. Step 3: Cross multiply
    7,959.78x = 11,939.67 × 2,765.25
  4. Step 4: Simplify right side
    7,959.78x = 33,016,172.47
  5. Step 5: Solve for x
    x = 33,016,172.47/7,959.78
  6. Step 6: Final answer
    x = 4,147.88

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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.