Home / 2,161.28-3,227.74-2,138.60

Finding the Fourth Proportional to 2,161.28, 3,227.74 and 2,138.60

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Solution

The fourth proportional to 2,161.28, 3,227.74 and 2,138.60 is: 3,193.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.28 : 3,227.74 = 2,138.60 : x
  2. Step 2: Convert to fraction form
    2,161.28/3,227.74 = 2,138.60/x
  3. Step 3: Cross multiply
    2,161.28x = 3,227.74 × 2,138.60
  4. Step 4: Simplify right side
    2,161.28x = 6,902,844.76
  5. Step 5: Solve for x
    x = 6,902,844.76/2,161.28
  6. Step 6: Final answer
    x = 3,193.87

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.