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Finding the Fourth Proportional to 8,643.26, 12,960.63 and 2,799.11

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Solution

The fourth proportional to 8,643.26, 12,960.63 and 2,799.11 is: 4,197.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.26 : 12,960.63 = 2,799.11 : x
  2. Step 2: Convert to fraction form
    8,643.26/12,960.63 = 2,799.11/x
  3. Step 3: Cross multiply
    8,643.26x = 12,960.63 × 2,799.11
  4. Step 4: Simplify right side
    8,643.26x = 36,278,261.44
  5. Step 5: Solve for x
    x = 36,278,261.44/8,643.26
  6. Step 6: Final answer
    x = 4,197.29

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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.