Home / 2,121.40-3,182.10-2,092.60

Finding the Fourth Proportional to 2,121.40, 3,182.10 and 2,092.60

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Solution

The fourth proportional to 2,121.40, 3,182.10 and 2,092.60 is: 3,138.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.40 : 3,182.10 = 2,092.60 : x
  2. Step 2: Convert to fraction form
    2,121.40/3,182.10 = 2,092.60/x
  3. Step 3: Cross multiply
    2,121.40x = 3,182.10 × 2,092.60
  4. Step 4: Simplify right side
    2,121.40x = 6,658,862.46
  5. Step 5: Solve for x
    x = 6,658,862.46/2,121.40
  6. Step 6: Final answer
    x = 3,138.90

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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.