Home / 3,908.16-5,393.28-2,139.89

Finding the Fourth Proportional to 3,908.16, 5,393.28 and 2,139.89

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Solution

The fourth proportional to 3,908.16, 5,393.28 and 2,139.89 is: 2,953.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.16 : 5,393.28 = 2,139.89 : x
  2. Step 2: Convert to fraction form
    3,908.16/5,393.28 = 2,139.89/x
  3. Step 3: Cross multiply
    3,908.16x = 5,393.28 × 2,139.89
  4. Step 4: Simplify right side
    3,908.16x = 11,540,998.97
  5. Step 5: Solve for x
    x = 11,540,998.97/3,908.16
  6. Step 6: Final answer
    x = 2,953.05

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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.