Home / 3,940.60-5,437.81-2,171.87

Finding the Fourth Proportional to 3,940.60, 5,437.81 and 2,171.87

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Solution

The fourth proportional to 3,940.60, 5,437.81 and 2,171.87 is: 2,997.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.60 : 5,437.81 = 2,171.87 : x
  2. Step 2: Convert to fraction form
    3,940.60/5,437.81 = 2,171.87/x
  3. Step 3: Cross multiply
    3,940.60x = 5,437.81 × 2,171.87
  4. Step 4: Simplify right side
    3,940.60x = 11,810,216.40
  5. Step 5: Solve for x
    x = 11,810,216.40/3,940.60
  6. Step 6: Final answer
    x = 2,997.06

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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.