Home / 3,121.62-4,308.17-1,926.54

Finding the Fourth Proportional to 3,121.62, 4,308.17 and 1,926.54

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Solution

The fourth proportional to 3,121.62, 4,308.17 and 1,926.54 is: 2,658.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.62 : 4,308.17 = 1,926.54 : x
  2. Step 2: Convert to fraction form
    3,121.62/4,308.17 = 1,926.54/x
  3. Step 3: Cross multiply
    3,121.62x = 4,308.17 × 1,926.54
  4. Step 4: Simplify right side
    3,121.62x = 8,299,852.20
  5. Step 5: Solve for x
    x = 8,299,852.20/3,121.62
  6. Step 6: Final answer
    x = 2,658.83

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.