Home / 3,939.77-5,437.13-2,171.36

Finding the Fourth Proportional to 3,939.77, 5,437.13 and 2,171.36

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Solution

The fourth proportional to 3,939.77, 5,437.13 and 2,171.36 is: 2,996.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.77 : 5,437.13 = 2,171.36 : x
  2. Step 2: Convert to fraction form
    3,939.77/5,437.13 = 2,171.36/x
  3. Step 3: Cross multiply
    3,939.77x = 5,437.13 × 2,171.36
  4. Step 4: Simplify right side
    3,939.77x = 11,805,969.33
  5. Step 5: Solve for x
    x = 11,805,969.33/3,939.77
  6. Step 6: Final answer
    x = 2,996.61

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1.5x scale

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.