Home / 3,889.89-5,367.97-2,121.53

Finding the Fourth Proportional to 3,889.89, 5,367.97 and 2,121.53

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Solution

The fourth proportional to 3,889.89, 5,367.97 and 2,121.53 is: 2,927.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.89 : 5,367.97 = 2,121.53 : x
  2. Step 2: Convert to fraction form
    3,889.89/5,367.97 = 2,121.53/x
  3. Step 3: Cross multiply
    3,889.89x = 5,367.97 × 2,121.53
  4. Step 4: Simplify right side
    3,889.89x = 11,388,285.21
  5. Step 5: Solve for x
    x = 11,388,285.21/3,889.89
  6. Step 6: Final answer
    x = 2,927.66

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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.