Home / 3,940.97-5,438.46-2,172.64

Finding the Fourth Proportional to 3,940.97, 5,438.46 and 2,172.64

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Solution

The fourth proportional to 3,940.97, 5,438.46 and 2,172.64 is: 2,998.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.97 : 5,438.46 = 2,172.64 : x
  2. Step 2: Convert to fraction form
    3,940.97/5,438.46 = 2,172.64/x
  3. Step 3: Cross multiply
    3,940.97x = 5,438.46 × 2,172.64
  4. Step 4: Simplify right side
    3,940.97x = 11,815,815.73
  5. Step 5: Solve for x
    x = 11,815,815.73/3,940.97
  6. Step 6: Final answer
    x = 2,998.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.