Home / 3,881.06-5,355.86-2,112.66

Finding the Fourth Proportional to 3,881.06, 5,355.86 and 2,112.66

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Solution

The fourth proportional to 3,881.06, 5,355.86 and 2,112.66 is: 2,915.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.06 : 5,355.86 = 2,112.66 : x
  2. Step 2: Convert to fraction form
    3,881.06/5,355.86 = 2,112.66/x
  3. Step 3: Cross multiply
    3,881.06x = 5,355.86 × 2,112.66
  4. Step 4: Simplify right side
    3,881.06x = 11,315,100.62
  5. Step 5: Solve for x
    x = 11,315,100.62/3,881.06
  6. Step 6: Final answer
    x = 2,915.47

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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.