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Finding the Fourth Proportional to 3,885.36, 5,361.81 and 2,116.97

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Solution

The fourth proportional to 3,885.36, 5,361.81 and 2,116.97 is: 2,921.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.36 : 5,361.81 = 2,116.97 : x
  2. Step 2: Convert to fraction form
    3,885.36/5,361.81 = 2,116.97/x
  3. Step 3: Cross multiply
    3,885.36x = 5,361.81 × 2,116.97
  4. Step 4: Simplify right side
    3,885.36x = 11,350,764.11
  5. Step 5: Solve for x
    x = 11,350,764.11/3,885.36
  6. Step 6: Final answer
    x = 2,921.42

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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.