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Finding the Fourth Proportional to 7,959.60, 11,939.88 and 2,764.80

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Solution

The fourth proportional to 7,959.60, 11,939.88 and 2,764.80 is: 4,147.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.60 : 11,939.88 = 2,764.80 : x
  2. Step 2: Convert to fraction form
    7,959.60/11,939.88 = 2,764.80/x
  3. Step 3: Cross multiply
    7,959.60x = 11,939.88 × 2,764.80
  4. Step 4: Simplify right side
    7,959.60x = 33,011,380.22
  5. Step 5: Solve for x
    x = 33,011,380.22/7,959.60
  6. Step 6: Final answer
    x = 4,147.37

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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.