Home / 3,982.78-5,492.77-2,787.17

Finding the Fourth Proportional to 3,982.78, 5,492.77 and 2,787.17

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Solution

The fourth proportional to 3,982.78, 5,492.77 and 2,787.17 is: 3,843.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,982.78 : 5,492.77 = 2,787.17 : x
  2. Step 2: Convert to fraction form
    3,982.78/5,492.77 = 2,787.17/x
  3. Step 3: Cross multiply
    3,982.78x = 5,492.77 × 2,787.17
  4. Step 4: Simplify right side
    3,982.78x = 15,309,249.33
  5. Step 5: Solve for x
    x = 15,309,249.33/3,982.78
  6. Step 6: Final answer
    x = 3,843.86

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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.