Home / 7,961.88-11,942.80-2,118.49

Finding the Fourth Proportional to 7,961.88, 11,942.80 and 2,118.49

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Solution

The fourth proportional to 7,961.88, 11,942.80 and 2,118.49 is: 3,177.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,961.88 : 11,942.80 = 2,118.49 : x
  2. Step 2: Convert to fraction form
    7,961.88/11,942.80 = 2,118.49/x
  3. Step 3: Cross multiply
    7,961.88x = 11,942.80 × 2,118.49
  4. Step 4: Simplify right side
    7,961.88x = 25,300,702.37
  5. Step 5: Solve for x
    x = 25,300,702.37/7,961.88
  6. Step 6: Final answer
    x = 3,177.73

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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.