Home / 5,243.20-7,865.20-2,121.73

Finding the Fourth Proportional to 5,243.20, 7,865.20 and 2,121.73

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Solution

The fourth proportional to 5,243.20, 7,865.20 and 2,121.73 is: 3,182.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,243.20 : 7,865.20 = 2,121.73 : x
  2. Step 2: Convert to fraction form
    5,243.20/7,865.20 = 2,121.73/x
  3. Step 3: Cross multiply
    5,243.20x = 7,865.20 × 2,121.73
  4. Step 4: Simplify right side
    5,243.20x = 16,687,813.79
  5. Step 5: Solve for x
    x = 16,687,813.79/5,243.20
  6. Step 6: Final answer
    x = 3,182.76

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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.