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Finding the Fourth Proportional to 8,692.65, 13,043.36 and 3,431.43

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Solution

The fourth proportional to 8,692.65, 13,043.36 and 3,431.43 is: 5,148.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,692.65 : 13,043.36 = 3,431.43 : x
  2. Step 2: Convert to fraction form
    8,692.65/13,043.36 = 3,431.43/x
  3. Step 3: Cross multiply
    8,692.65x = 13,043.36 × 3,431.43
  4. Step 4: Simplify right side
    8,692.65x = 44,757,376.80
  5. Step 5: Solve for x
    x = 44,757,376.80/8,692.65
  6. Step 6: Final answer
    x = 5,148.88

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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.