Home / 3,889.39-5,367.39-2,121.03

Finding the Fourth Proportional to 3,889.39, 5,367.39 and 2,121.03

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Solution

The fourth proportional to 3,889.39, 5,367.39 and 2,121.03 is: 2,927.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.39 : 5,367.39 = 2,121.03 : x
  2. Step 2: Convert to fraction form
    3,889.39/5,367.39 = 2,121.03/x
  3. Step 3: Cross multiply
    3,889.39x = 5,367.39 × 2,121.03
  4. Step 4: Simplify right side
    3,889.39x = 11,384,357.77
  5. Step 5: Solve for x
    x = 11,384,357.77/3,889.39
  6. Step 6: Final answer
    x = 2,927.03

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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.