Home / 3,939.55-5,436.75-2,171.32

Finding the Fourth Proportional to 3,939.55, 5,436.75 and 2,171.32

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Solution

The fourth proportional to 3,939.55, 5,436.75 and 2,171.32 is: 2,996.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.55 : 5,436.75 = 2,171.32 : x
  2. Step 2: Convert to fraction form
    3,939.55/5,436.75 = 2,171.32/x
  3. Step 3: Cross multiply
    3,939.55x = 5,436.75 × 2,171.32
  4. Step 4: Simplify right side
    3,939.55x = 11,804,924.01
  5. Step 5: Solve for x
    x = 11,804,924.01/3,939.55
  6. Step 6: Final answer
    x = 2,996.52

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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.