Home / 3,885.18-5,361.50-2,116.78

Finding the Fourth Proportional to 3,885.18, 5,361.50 and 2,116.78

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Solution

The fourth proportional to 3,885.18, 5,361.50 and 2,116.78 is: 2,921.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.18 : 5,361.50 = 2,116.78 : x
  2. Step 2: Convert to fraction form
    3,885.18/5,361.50 = 2,116.78/x
  3. Step 3: Cross multiply
    3,885.18x = 5,361.50 × 2,116.78
  4. Step 4: Simplify right side
    3,885.18x = 11,349,115.97
  5. Step 5: Solve for x
    x = 11,349,115.97/3,885.18
  6. Step 6: Final answer
    x = 2,921.13

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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.