Home / 2,161.25-3,239.14-1,380.95

Finding the Fourth Proportional to 2,161.25, 3,239.14 and 1,380.95

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Solution

The fourth proportional to 2,161.25, 3,239.14 and 1,380.95 is: 2,069.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.25 : 3,239.14 = 1,380.95 : x
  2. Step 2: Convert to fraction form
    2,161.25/3,239.14 = 1,380.95/x
  3. Step 3: Cross multiply
    2,161.25x = 3,239.14 × 1,380.95
  4. Step 4: Simplify right side
    2,161.25x = 4,473,090.38
  5. Step 5: Solve for x
    x = 4,473,090.38/2,161.25
  6. Step 6: Final answer
    x = 2,069.68

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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.