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Finding the Fourth Proportional to 7,959.31, 11,940.22 and 2,620.82

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Solution

The fourth proportional to 7,959.31, 11,940.22 and 2,620.82 is: 3,931.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.31 : 11,940.22 = 2,620.82 : x
  2. Step 2: Convert to fraction form
    7,959.31/11,940.22 = 2,620.82/x
  3. Step 3: Cross multiply
    7,959.31x = 11,940.22 × 2,620.82
  4. Step 4: Simplify right side
    7,959.31x = 31,293,094.58
  5. Step 5: Solve for x
    x = 31,293,094.58/7,959.31
  6. Step 6: Final answer
    x = 3,931.64

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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.