Home / 3,885.28-5,361.68-2,116.88

Finding the Fourth Proportional to 3,885.28, 5,361.68 and 2,116.88

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Solution

The fourth proportional to 3,885.28, 5,361.68 and 2,116.88 is: 2,921.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.28 : 5,361.68 = 2,116.88 : x
  2. Step 2: Convert to fraction form
    3,885.28/5,361.68 = 2,116.88/x
  3. Step 3: Cross multiply
    3,885.28x = 5,361.68 × 2,116.88
  4. Step 4: Simplify right side
    3,885.28x = 11,350,033.16
  5. Step 5: Solve for x
    x = 11,350,033.16/3,885.28
  6. Step 6: Final answer
    x = 2,921.29

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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.