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Finding the Fourth Proportional to 7,912.82, 11,865.22 and 2,645.96

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Solution

The fourth proportional to 7,912.82, 11,865.22 and 2,645.96 is: 3,967.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,912.82 : 11,865.22 = 2,645.96 : x
  2. Step 2: Convert to fraction form
    7,912.82/11,865.22 = 2,645.96/x
  3. Step 3: Cross multiply
    7,912.82x = 11,865.22 × 2,645.96
  4. Step 4: Simplify right side
    7,912.82x = 31,394,897.51
  5. Step 5: Solve for x
    x = 31,394,897.51/7,912.82
  6. Step 6: Final answer
    x = 3,967.60

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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.