Home / 3,889.46-5,367.47-2,121.09

Finding the Fourth Proportional to 3,889.46, 5,367.47 and 2,121.09

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Solution

The fourth proportional to 3,889.46, 5,367.47 and 2,121.09 is: 2,927.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.46 : 5,367.47 = 2,121.09 : x
  2. Step 2: Convert to fraction form
    3,889.46/5,367.47 = 2,121.09/x
  3. Step 3: Cross multiply
    3,889.46x = 5,367.47 × 2,121.09
  4. Step 4: Simplify right side
    3,889.46x = 11,384,886.94
  5. Step 5: Solve for x
    x = 11,384,886.94/3,889.46
  6. Step 6: Final answer
    x = 2,927.12

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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.