Home / 3,121.82-4,678.80-2,730.89

Finding the Fourth Proportional to 3,121.82, 4,678.80 and 2,730.89

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Solution

The fourth proportional to 3,121.82, 4,678.80 and 2,730.89 is: 4,092.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.82 : 4,678.80 = 2,730.89 : x
  2. Step 2: Convert to fraction form
    3,121.82/4,678.80 = 2,730.89/x
  3. Step 3: Cross multiply
    3,121.82x = 4,678.80 × 2,730.89
  4. Step 4: Simplify right side
    3,121.82x = 12,777,288.13
  5. Step 5: Solve for x
    x = 12,777,288.13/3,121.82
  6. Step 6: Final answer
    x = 4,092.90

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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.