Home / 7,959.30-11,939.49-2,115.78

Finding the Fourth Proportional to 7,959.30, 11,939.49 and 2,115.78

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Solution

The fourth proportional to 7,959.30, 11,939.49 and 2,115.78 is: 3,173.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.30 : 11,939.49 = 2,115.78 : x
  2. Step 2: Convert to fraction form
    7,959.30/11,939.49 = 2,115.78/x
  3. Step 3: Cross multiply
    7,959.30x = 11,939.49 × 2,115.78
  4. Step 4: Simplify right side
    7,959.30x = 25,261,334.15
  5. Step 5: Solve for x
    x = 25,261,334.15/7,959.30
  6. Step 6: Final answer
    x = 3,173.81

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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.