Home / 3,181.89-4,391.21-2,117.82

Finding the Fourth Proportional to 3,181.89, 4,391.21 and 2,117.82

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Solution

The fourth proportional to 3,181.89, 4,391.21 and 2,117.82 is: 2,922.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,181.89 : 4,391.21 = 2,117.82 : x
  2. Step 2: Convert to fraction form
    3,181.89/4,391.21 = 2,117.82/x
  3. Step 3: Cross multiply
    3,181.89x = 4,391.21 × 2,117.82
  4. Step 4: Simplify right side
    3,181.89x = 9,299,781.77
  5. Step 5: Solve for x
    x = 9,299,781.77/3,181.89
  6. Step 6: Final answer
    x = 2,922.72

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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.