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Finding the Fourth Proportional to 7,959.96, 11,939.31 and 3,278.70

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Solution

The fourth proportional to 7,959.96, 11,939.31 and 3,278.70 is: 4,917.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.96 : 11,939.31 = 3,278.70 : x
  2. Step 2: Convert to fraction form
    7,959.96/11,939.31 = 3,278.70/x
  3. Step 3: Cross multiply
    7,959.96x = 11,939.31 × 3,278.70
  4. Step 4: Simplify right side
    7,959.96x = 39,145,415.70
  5. Step 5: Solve for x
    x = 39,145,415.70/7,959.96
  6. Step 6: Final answer
    x = 4,917.79

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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.