Home / 3,908.30-5,393.55-2,139.90

Finding the Fourth Proportional to 3,908.30, 5,393.55 and 2,139.90

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Solution

The fourth proportional to 3,908.30, 5,393.55 and 2,139.90 is: 2,953.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,908.30 : 5,393.55 = 2,139.90 : x
  2. Step 2: Convert to fraction form
    3,908.30/5,393.55 = 2,139.90/x
  3. Step 3: Cross multiply
    3,908.30x = 5,393.55 × 2,139.90
  4. Step 4: Simplify right side
    3,908.30x = 11,541,657.65
  5. Step 5: Solve for x
    x = 11,541,657.65/3,908.30
  6. Step 6: Final answer
    x = 2,953.11

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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.