Home / 3,939.13-5,435.99-2,170.73

Finding the Fourth Proportional to 3,939.13, 5,435.99 and 2,170.73

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Solution

The fourth proportional to 3,939.13, 5,435.99 and 2,170.73 is: 2,995.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,939.13 : 5,435.99 = 2,170.73 : x
  2. Step 2: Convert to fraction form
    3,939.13/5,435.99 = 2,170.73/x
  3. Step 3: Cross multiply
    3,939.13x = 5,435.99 × 2,170.73
  4. Step 4: Simplify right side
    3,939.13x = 11,800,066.57
  5. Step 5: Solve for x
    x = 11,800,066.57/3,939.13
  6. Step 6: Final answer
    x = 2,995.60

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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.