Home / 3,908.25-5,393.39-2,139.92

Finding the Fourth Proportional to 3,908.25, 5,393.39 and 2,139.92

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Solution

The fourth proportional to 3,908.25, 5,393.39 and 2,139.92 is: 2,953.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.25 : 5,393.39 = 2,139.92 : x
  2. Step 2: Convert to fraction form
    3,908.25/5,393.39 = 2,139.92/x
  3. Step 3: Cross multiply
    3,908.25x = 5,393.39 × 2,139.92
  4. Step 4: Simplify right side
    3,908.25x = 11,541,405.69
  5. Step 5: Solve for x
    x = 11,541,405.69/3,908.25
  6. Step 6: Final answer
    x = 2,953.09

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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.