Home / 3,873.49-5,345.20-2,105.09

Finding the Fourth Proportional to 3,873.49, 5,345.20 and 2,105.09

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Solution

The fourth proportional to 3,873.49, 5,345.20 and 2,105.09 is: 2,904.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,873.49 : 5,345.20 = 2,105.09 : x
  2. Step 2: Convert to fraction form
    3,873.49/5,345.20 = 2,105.09/x
  3. Step 3: Cross multiply
    3,873.49x = 5,345.20 × 2,105.09
  4. Step 4: Simplify right side
    3,873.49x = 11,252,089.82
  5. Step 5: Solve for x
    x = 11,252,089.82/3,873.49
  6. Step 6: Final answer
    x = 2,904.90

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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.