Home / 3,889.65-5,367.42-2,121.15

Finding the Fourth Proportional to 3,889.65, 5,367.42 and 2,121.15

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Solution

The fourth proportional to 3,889.65, 5,367.42 and 2,121.15 is: 2,927.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.65 : 5,367.42 = 2,121.15 : x
  2. Step 2: Convert to fraction form
    3,889.65/5,367.42 = 2,121.15/x
  3. Step 3: Cross multiply
    3,889.65x = 5,367.42 × 2,121.15
  4. Step 4: Simplify right side
    3,889.65x = 11,385,102.93
  5. Step 5: Solve for x
    x = 11,385,102.93/3,889.65
  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.