Home / 3,939.73-5,436.94-2,171.45

Finding the Fourth Proportional to 3,939.73, 5,436.94 and 2,171.45

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Solution

The fourth proportional to 3,939.73, 5,436.94 and 2,171.45 is: 2,996.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.73 : 5,436.94 = 2,171.45 : x
  2. Step 2: Convert to fraction form
    3,939.73/5,436.94 = 2,171.45/x
  3. Step 3: Cross multiply
    3,939.73x = 5,436.94 × 2,171.45
  4. Step 4: Simplify right side
    3,939.73x = 11,806,043.36
  5. Step 5: Solve for x
    x = 11,806,043.36/3,939.73
  6. Step 6: Final answer
    x = 2,996.66

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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.