Home / 2,161.26-3,239.31-1,121.73

Finding the Fourth Proportional to 2,161.26, 3,239.31 and 1,121.73

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Solution

The fourth proportional to 2,161.26, 3,239.31 and 1,121.73 is: 1,681.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.26 : 3,239.31 = 1,121.73 : x
  2. Step 2: Convert to fraction form
    2,161.26/3,239.31 = 1,121.73/x
  3. Step 3: Cross multiply
    2,161.26x = 3,239.31 × 1,121.73
  4. Step 4: Simplify right side
    2,161.26x = 3,633,631.21
  5. Step 5: Solve for x
    x = 3,633,631.21/2,161.26
  6. Step 6: Final answer
    x = 1,681.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.