Home / 3,908.20-5,393.27-2,139.80

Finding the Fourth Proportional to 3,908.20, 5,393.27 and 2,139.80

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Solution

The fourth proportional to 3,908.20, 5,393.27 and 2,139.80 is: 2,952.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.20 : 5,393.27 = 2,139.80 : x
  2. Step 2: Convert to fraction form
    3,908.20/5,393.27 = 2,139.80/x
  3. Step 3: Cross multiply
    3,908.20x = 5,393.27 × 2,139.80
  4. Step 4: Simplify right side
    3,908.20x = 11,540,547.61
  5. Step 5: Solve for x
    x = 11,540,547.61/3,908.20
  6. Step 6: Final answer
    x = 2,952.91

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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.