Home / 3,939.17-5,436.18-2,170.84

Finding the Fourth Proportional to 3,939.17, 5,436.18 and 2,170.84

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Solution

The fourth proportional to 3,939.17, 5,436.18 and 2,170.84 is: 2,995.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.17 : 5,436.18 = 2,170.84 : x
  2. Step 2: Convert to fraction form
    3,939.17/5,436.18 = 2,170.84/x
  3. Step 3: Cross multiply
    3,939.17x = 5,436.18 × 2,170.84
  4. Step 4: Simplify right side
    3,939.17x = 11,801,038.96
  5. Step 5: Solve for x
    x = 11,801,038.96/3,939.17
  6. Step 6: Final answer
    x = 2,995.82

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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.