Home / 3,881.12-5,355.80-2,112.68

Finding the Fourth Proportional to 3,881.12, 5,355.80 and 2,112.68

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Solution

The fourth proportional to 3,881.12, 5,355.80 and 2,112.68 is: 2,915.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.12 : 5,355.80 = 2,112.68 : x
  2. Step 2: Convert to fraction form
    3,881.12/5,355.80 = 2,112.68/x
  3. Step 3: Cross multiply
    3,881.12x = 5,355.80 × 2,112.68
  4. Step 4: Simplify right side
    3,881.12x = 11,315,096.35
  5. Step 5: Solve for x
    x = 11,315,096.35/3,881.12
  6. Step 6: Final answer
    x = 2,915.42

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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.