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Finding the Fourth Proportional to 7,959.80, 11,940.24 and 2,116.28

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Solution

The fourth proportional to 7,959.80, 11,940.24 and 2,116.28 is: 3,174.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.80 : 11,940.24 = 2,116.28 : x
  2. Step 2: Convert to fraction form
    7,959.80/11,940.24 = 2,116.28/x
  3. Step 3: Cross multiply
    7,959.80x = 11,940.24 × 2,116.28
  4. Step 4: Simplify right side
    7,959.80x = 25,268,891.11
  5. Step 5: Solve for x
    x = 25,268,891.11/7,959.80
  6. Step 6: Final answer
    x = 3,174.56

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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.