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Finding the Fourth Proportional to 8,643.64, 12,960.80 and 3,093.94

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Solution

The fourth proportional to 8,643.64, 12,960.80 and 3,093.94 is: 4,639.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.64 : 12,960.80 = 3,093.94 : x
  2. Step 2: Convert to fraction form
    8,643.64/12,960.80 = 3,093.94/x
  3. Step 3: Cross multiply
    8,643.64x = 12,960.80 × 3,093.94
  4. Step 4: Simplify right side
    8,643.64x = 40,099,937.55
  5. Step 5: Solve for x
    x = 40,099,937.55/8,643.64
  6. Step 6: Final answer
    x = 4,639.24

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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.