Home / 3,881.40-5,356.07-2,112.98

Finding the Fourth Proportional to 3,881.40, 5,356.07 and 2,112.98

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Solution

The fourth proportional to 3,881.40, 5,356.07 and 2,112.98 is: 2,915.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.40 : 5,356.07 = 2,112.98 : x
  2. Step 2: Convert to fraction form
    3,881.40/5,356.07 = 2,112.98/x
  3. Step 3: Cross multiply
    3,881.40x = 5,356.07 × 2,112.98
  4. Step 4: Simplify right side
    3,881.40x = 11,317,231.44
  5. Step 5: Solve for x
    x = 11,317,231.44/3,881.40
  6. Step 6: Final answer
    x = 2,915.76

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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.