Home / 3,940.41-5,437.79-2,172.01

Finding the Fourth Proportional to 3,940.41, 5,437.79 and 2,172.01

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Solution

The fourth proportional to 3,940.41, 5,437.79 and 2,172.01 is: 2,997.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.41 : 5,437.79 = 2,172.01 : x
  2. Step 2: Convert to fraction form
    3,940.41/5,437.79 = 2,172.01/x
  3. Step 3: Cross multiply
    3,940.41x = 5,437.79 × 2,172.01
  4. Step 4: Simplify right side
    3,940.41x = 11,810,934.26
  5. Step 5: Solve for x
    x = 11,810,934.26/3,940.41
  6. Step 6: Final answer
    x = 2,997.39

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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.