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Finding the Fourth Proportional to 8,640.84, 12,960.71 and 3,093.90

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Solution

The fourth proportional to 8,640.84, 12,960.71 and 3,093.90 is: 4,640.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,640.84 : 12,960.71 = 3,093.90 : x
  2. Step 2: Convert to fraction form
    8,640.84/12,960.71 = 3,093.90/x
  3. Step 3: Cross multiply
    8,640.84x = 12,960.71 × 3,093.90
  4. Step 4: Simplify right side
    8,640.84x = 40,099,088.20
  5. Step 5: Solve for x
    x = 40,099,088.20/8,640.84
  6. Step 6: Final answer
    x = 4,640.64

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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.