Home / 3,873.78-5,345.82-2,105.43

Finding the Fourth Proportional to 3,873.78, 5,345.82 and 2,105.43

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Solution

The fourth proportional to 3,873.78, 5,345.82 and 2,105.43 is: 2,905.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,873.78 : 5,345.82 = 2,105.43 : x
  2. Step 2: Convert to fraction form
    3,873.78/5,345.82 = 2,105.43/x
  3. Step 3: Cross multiply
    3,873.78x = 5,345.82 × 2,105.43
  4. Step 4: Simplify right side
    3,873.78x = 11,255,249.80
  5. Step 5: Solve for x
    x = 11,255,249.80/3,873.78
  6. Step 6: Final answer
    x = 2,905.50

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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.