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Finding the Fourth Proportional to 8,643.94, 12,963.21 and 2,799.34

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Solution

The fourth proportional to 8,643.94, 12,963.21 and 2,799.34 is: 4,198.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.94 : 12,963.21 = 2,799.34 : x
  2. Step 2: Convert to fraction form
    8,643.94/12,963.21 = 2,799.34/x
  3. Step 3: Cross multiply
    8,643.94x = 12,963.21 × 2,799.34
  4. Step 4: Simplify right side
    8,643.94x = 36,288,432.28
  5. Step 5: Solve for x
    x = 36,288,432.28/8,643.94
  6. Step 6: Final answer
    x = 4,198.14

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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.