Home / 3,906.36-5,394.06-2,790.72

Finding the Fourth Proportional to 3,906.36, 5,394.06 and 2,790.72

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Solution

The fourth proportional to 3,906.36, 5,394.06 and 2,790.72 is: 3,853.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,906.36 : 5,394.06 = 2,790.72 : x
  2. Step 2: Convert to fraction form
    3,906.36/5,394.06 = 2,790.72/x
  3. Step 3: Cross multiply
    3,906.36x = 5,394.06 × 2,790.72
  4. Step 4: Simplify right side
    3,906.36x = 15,053,311.12
  5. Step 5: Solve for x
    x = 15,053,311.12/3,906.36
  6. Step 6: Final answer
    x = 3,853.54

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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.