Home / 3,991.28-5,502.26-2,808.68

Finding the Fourth Proportional to 3,991.28, 5,502.26 and 2,808.68

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Solution

The fourth proportional to 3,991.28, 5,502.26 and 2,808.68 is: 3,871.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,991.28 : 5,502.26 = 2,808.68 : x
  2. Step 2: Convert to fraction form
    3,991.28/5,502.26 = 2,808.68/x
  3. Step 3: Cross multiply
    3,991.28x = 5,502.26 × 2,808.68
  4. Step 4: Simplify right side
    3,991.28x = 15,454,046.06
  5. Step 5: Solve for x
    x = 15,454,046.06/3,991.28
  6. Step 6: Final answer
    x = 3,871.96

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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.