Home / 3,938.82-5,435.52-2,170.38

Finding the Fourth Proportional to 3,938.82, 5,435.52 and 2,170.38

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Solution

The fourth proportional to 3,938.82, 5,435.52 and 2,170.38 is: 2,995.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.82 : 5,435.52 = 2,170.38 : x
  2. Step 2: Convert to fraction form
    3,938.82/5,435.52 = 2,170.38/x
  3. Step 3: Cross multiply
    3,938.82x = 5,435.52 × 2,170.38
  4. Step 4: Simplify right side
    3,938.82x = 11,797,143.90
  5. Step 5: Solve for x
    x = 11,797,143.90/3,938.82
  6. Step 6: Final answer
    x = 2,995.10

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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.