Home / 3,939.97-5,437.09-2,171.64

Finding the Fourth Proportional to 3,939.97, 5,437.09 and 2,171.64

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Solution

The fourth proportional to 3,939.97, 5,437.09 and 2,171.64 is: 2,996.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.97 : 5,437.09 = 2,171.64 : x
  2. Step 2: Convert to fraction form
    3,939.97/5,437.09 = 2,171.64/x
  3. Step 3: Cross multiply
    3,939.97x = 5,437.09 × 2,171.64
  4. Step 4: Simplify right side
    3,939.97x = 11,807,364.08
  5. Step 5: Solve for x
    x = 11,807,364.08/3,939.97
  6. Step 6: Final answer
    x = 2,996.82

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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.