Home / 3,881.13-5,356.08-2,112.86

Finding the Fourth Proportional to 3,881.13, 5,356.08 and 2,112.86

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Solution

The fourth proportional to 3,881.13, 5,356.08 and 2,112.86 is: 2,915.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.13 : 5,356.08 = 2,112.86 : x
  2. Step 2: Convert to fraction form
    3,881.13/5,356.08 = 2,112.86/x
  3. Step 3: Cross multiply
    3,881.13x = 5,356.08 × 2,112.86
  4. Step 4: Simplify right side
    3,881.13x = 11,316,620.41
  5. Step 5: Solve for x
    x = 11,316,620.41/3,881.13
  6. Step 6: Final answer
    x = 2,915.81

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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.