Home / 3,881.21-5,355.99-2,112.77

Finding the Fourth Proportional to 3,881.21, 5,355.99 and 2,112.77

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Solution

The fourth proportional to 3,881.21, 5,355.99 and 2,112.77 is: 2,915.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,881.21 : 5,355.99 = 2,112.77 : x
  2. Step 2: Convert to fraction form
    3,881.21/5,355.99 = 2,112.77/x
  3. Step 3: Cross multiply
    3,881.21x = 5,355.99 × 2,112.77
  4. Step 4: Simplify right side
    3,881.21x = 11,315,988.38
  5. Step 5: Solve for x
    x = 11,315,988.38/3,881.21
  6. Step 6: Final answer
    x = 2,915.59

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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.