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Finding the Fourth Proportional to 8,616.36, 12,914.11 and 3,929.95

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Solution

The fourth proportional to 8,616.36, 12,914.11 and 3,929.95 is: 5,890.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,616.36 : 12,914.11 = 3,929.95 : x
  2. Step 2: Convert to fraction form
    8,616.36/12,914.11 = 3,929.95/x
  3. Step 3: Cross multiply
    8,616.36x = 12,914.11 × 3,929.95
  4. Step 4: Simplify right side
    8,616.36x = 50,751,786.94
  5. Step 5: Solve for x
    x = 50,751,786.94/8,616.36
  6. Step 6: Final answer
    x = 5,890.17

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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.