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Finding the Fourth Proportional to 8,651.56, 12,976.69 and 3,385.56

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Solution

The fourth proportional to 8,651.56, 12,976.69 and 3,385.56 is: 5,078.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,651.56 : 12,976.69 = 3,385.56 : x
  2. Step 2: Convert to fraction form
    8,651.56/12,976.69 = 3,385.56/x
  3. Step 3: Cross multiply
    8,651.56x = 12,976.69 × 3,385.56
  4. Step 4: Simplify right side
    8,651.56x = 43,933,368.68
  5. Step 5: Solve for x
    x = 43,933,368.68/8,651.56
  6. Step 6: Final answer
    x = 5,078.09

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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.