Home / 3,311.85-4,567.98-2,131.79

Finding the Fourth Proportional to 3,311.85, 4,567.98 and 2,131.79

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Solution

The fourth proportional to 3,311.85, 4,567.98 and 2,131.79 is: 2,940.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,311.85 : 4,567.98 = 2,131.79 : x
  2. Step 2: Convert to fraction form
    3,311.85/4,567.98 = 2,131.79/x
  3. Step 3: Cross multiply
    3,311.85x = 4,567.98 × 2,131.79
  4. Step 4: Simplify right side
    3,311.85x = 9,737,951.24
  5. Step 5: Solve for x
    x = 9,737,951.24/3,311.85
  6. Step 6: Final answer
    x = 2,940.34

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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.