Home / 3,873.87-5,345.91-2,105.43

Finding the Fourth Proportional to 3,873.87, 5,345.91 and 2,105.43

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Solution

The fourth proportional to 3,873.87, 5,345.91 and 2,105.43 is: 2,905.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,873.87 : 5,345.91 = 2,105.43 : x
  2. Step 2: Convert to fraction form
    3,873.87/5,345.91 = 2,105.43/x
  3. Step 3: Cross multiply
    3,873.87x = 5,345.91 × 2,105.43
  4. Step 4: Simplify right side
    3,873.87x = 11,255,439.29
  5. Step 5: Solve for x
    x = 11,255,439.29/3,873.87
  6. Step 6: Final answer
    x = 2,905.48

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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.