Home / 3,939.50-5,436.51-2,171.11

Finding the Fourth Proportional to 3,939.50, 5,436.51 and 2,171.11

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Solution

The fourth proportional to 3,939.50, 5,436.51 and 2,171.11 is: 2,996.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.50 : 5,436.51 = 2,171.11 : x
  2. Step 2: Convert to fraction form
    3,939.50/5,436.51 = 2,171.11/x
  3. Step 3: Cross multiply
    3,939.50x = 5,436.51 × 2,171.11
  4. Step 4: Simplify right side
    3,939.50x = 11,803,261.23
  5. Step 5: Solve for x
    x = 11,803,261.23/3,939.50
  6. Step 6: Final answer
    x = 2,996.13

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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.