Home / 3,889.70-5,367.82-2,121.34

Finding the Fourth Proportional to 3,889.70, 5,367.82 and 2,121.34

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Solution

The fourth proportional to 3,889.70, 5,367.82 and 2,121.34 is: 2,927.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.70 : 5,367.82 = 2,121.34 : x
  2. Step 2: Convert to fraction form
    3,889.70/5,367.82 = 2,121.34/x
  3. Step 3: Cross multiply
    3,889.70x = 5,367.82 × 2,121.34
  4. Step 4: Simplify right side
    3,889.70x = 11,386,952.56
  5. Step 5: Solve for x
    x = 11,386,952.56/3,889.70
  6. Step 6: Final answer
    x = 2,927.46

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1.5x scale

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.