Home / 3,908.64-5,393.70-2,139.90

Finding the Fourth Proportional to 3,908.64, 5,393.70 and 2,139.90

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Solution

The fourth proportional to 3,908.64, 5,393.70 and 2,139.90 is: 2,952.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.64 : 5,393.70 = 2,139.90 : x
  2. Step 2: Convert to fraction form
    3,908.64/5,393.70 = 2,139.90/x
  3. Step 3: Cross multiply
    3,908.64x = 5,393.70 × 2,139.90
  4. Step 4: Simplify right side
    3,908.64x = 11,541,978.63
  5. Step 5: Solve for x
    x = 11,541,978.63/3,908.64
  6. Step 6: Final answer
    x = 2,952.94

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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.