Home / 3,939.24-5,436.21-2,170.98

Finding the Fourth Proportional to 3,939.24, 5,436.21 and 2,170.98

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Solution

The fourth proportional to 3,939.24, 5,436.21 and 2,170.98 is: 2,995.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.24 : 5,436.21 = 2,170.98 : x
  2. Step 2: Convert to fraction form
    3,939.24/5,436.21 = 2,170.98/x
  3. Step 3: Cross multiply
    3,939.24x = 5,436.21 × 2,170.98
  4. Step 4: Simplify right side
    3,939.24x = 11,801,903.19
  5. Step 5: Solve for x
    x = 11,801,903.19/3,939.24
  6. Step 6: Final answer
    x = 2,995.98

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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.