Home / 3,908.17-5,393.28-2,139.88

Finding the Fourth Proportional to 3,908.17, 5,393.28 and 2,139.88

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Solution

The fourth proportional to 3,908.17, 5,393.28 and 2,139.88 is: 2,953.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.17 : 5,393.28 = 2,139.88 : x
  2. Step 2: Convert to fraction form
    3,908.17/5,393.28 = 2,139.88/x
  3. Step 3: Cross multiply
    3,908.17x = 5,393.28 × 2,139.88
  4. Step 4: Simplify right side
    3,908.17x = 11,540,961.31
  5. Step 5: Solve for x
    x = 11,540,961.31/3,908.17
  6. Step 6: Final answer
    x = 2,953.04

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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.