Home / 3,943.78-5,442.30-2,811.49

Finding the Fourth Proportional to 3,943.78, 5,442.30 and 2,811.49

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Solution

The fourth proportional to 3,943.78, 5,442.30 and 2,811.49 is: 3,879.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,943.78 : 5,442.30 = 2,811.49 : x
  2. Step 2: Convert to fraction form
    3,943.78/5,442.30 = 2,811.49/x
  3. Step 3: Cross multiply
    3,943.78x = 5,442.30 × 2,811.49
  4. Step 4: Simplify right side
    3,943.78x = 15,300,972.61
  5. Step 5: Solve for x
    x = 15,300,972.61/3,943.78
  6. Step 6: Final answer
    x = 3,879.78

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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.