Home / 3,940.76-5,438.26-2,172.37

Finding the Fourth Proportional to 3,940.76, 5,438.26 and 2,172.37

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Solution

The fourth proportional to 3,940.76, 5,438.26 and 2,172.37 is: 2,997.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.76 : 5,438.26 = 2,172.37 : x
  2. Step 2: Convert to fraction form
    3,940.76/5,438.26 = 2,172.37/x
  3. Step 3: Cross multiply
    3,940.76x = 5,438.26 × 2,172.37
  4. Step 4: Simplify right side
    3,940.76x = 11,813,918.30
  5. Step 5: Solve for x
    x = 11,813,918.30/3,940.76
  6. Step 6: Final answer
    x = 2,997.88

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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.