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Finding the Fourth Proportional to 8,236.65, 12,356.16 and 2,688.63

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Solution

The fourth proportional to 8,236.65, 12,356.16 and 2,688.63 is: 4,033.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,236.65 : 12,356.16 = 2,688.63 : x
  2. Step 2: Convert to fraction form
    8,236.65/12,356.16 = 2,688.63/x
  3. Step 3: Cross multiply
    8,236.65x = 12,356.16 × 2,688.63
  4. Step 4: Simplify right side
    8,236.65x = 33,221,067.24
  5. Step 5: Solve for x
    x = 33,221,067.24/8,236.65
  6. Step 6: Final answer
    x = 4,033.32

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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.