Home / 3,885.12-5,361.43-2,116.72

Finding the Fourth Proportional to 3,885.12, 5,361.43 and 2,116.72

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Solution

The fourth proportional to 3,885.12, 5,361.43 and 2,116.72 is: 2,921.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.12 : 5,361.43 = 2,116.72 : x
  2. Step 2: Convert to fraction form
    3,885.12/5,361.43 = 2,116.72/x
  3. Step 3: Cross multiply
    3,885.12x = 5,361.43 × 2,116.72
  4. Step 4: Simplify right side
    3,885.12x = 11,348,646.11
  5. Step 5: Solve for x
    x = 11,348,646.11/3,885.12
  6. Step 6: Final answer
    x = 2,921.05

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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.