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Finding the Fourth Proportional to 11,912.28, 17,867.88 and 5,675.28

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Solution

The fourth proportional to 11,912.28, 17,867.88 and 5,675.28 is: 8,512.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,912.28 : 17,867.88 = 5,675.28 : x
  2. Step 2: Convert to fraction form
    11,912.28/17,867.88 = 5,675.28/x
  3. Step 3: Cross multiply
    11,912.28x = 17,867.88 × 5,675.28
  4. Step 4: Simplify right side
    11,912.28x = 101,405,222.01
  5. Step 5: Solve for x
    x = 101,405,222.01/11,912.28
  6. Step 6: Final answer
    x = 8,512.66

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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.