Home / 3,940.92-5,438.60-2,172.59

Finding the Fourth Proportional to 3,940.92, 5,438.60 and 2,172.59

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Solution

The fourth proportional to 3,940.92, 5,438.60 and 2,172.59 is: 2,998.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.92 : 5,438.60 = 2,172.59 : x
  2. Step 2: Convert to fraction form
    3,940.92/5,438.60 = 2,172.59/x
  3. Step 3: Cross multiply
    3,940.92x = 5,438.60 × 2,172.59
  4. Step 4: Simplify right side
    3,940.92x = 11,815,847.97
  5. Step 5: Solve for x
    x = 11,815,847.97/3,940.92
  6. Step 6: Final answer
    x = 2,998.25

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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.