Home / 5,181.21-7,149.81-2,942.79

Finding the Fourth Proportional to 5,181.21, 7,149.81 and 2,942.79

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Solution

The fourth proportional to 5,181.21, 7,149.81 and 2,942.79 is: 4,060.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,181.21 : 7,149.81 = 2,942.79 : x
  2. Step 2: Convert to fraction form
    5,181.21/7,149.81 = 2,942.79/x
  3. Step 3: Cross multiply
    5,181.21x = 7,149.81 × 2,942.79
  4. Step 4: Simplify right side
    5,181.21x = 21,040,393.05
  5. Step 5: Solve for x
    x = 21,040,393.05/5,181.21
  6. Step 6: Final answer
    x = 4,060.91

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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.