Home / 3,685.38-5,519.76-2,121.68

Finding the Fourth Proportional to 3,685.38, 5,519.76 and 2,121.68

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Solution

The fourth proportional to 3,685.38, 5,519.76 and 2,121.68 is: 3,177.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,685.38 : 5,519.76 = 2,121.68 : x
  2. Step 2: Convert to fraction form
    3,685.38/5,519.76 = 2,121.68/x
  3. Step 3: Cross multiply
    3,685.38x = 5,519.76 × 2,121.68
  4. Step 4: Simplify right side
    3,685.38x = 11,711,136.80
  5. Step 5: Solve for x
    x = 11,711,136.80/3,685.38
  6. Step 6: Final answer
    x = 3,177.73

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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.