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Finding the Fourth Proportional to 8,338.32, 12,509.49 and 2,791.69

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Solution

The fourth proportional to 8,338.32, 12,509.49 and 2,791.69 is: 4,188.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,338.32 : 12,509.49 = 2,791.69 : x
  2. Step 2: Convert to fraction form
    8,338.32/12,509.49 = 2,791.69/x
  3. Step 3: Cross multiply
    8,338.32x = 12,509.49 × 2,791.69
  4. Step 4: Simplify right side
    8,338.32x = 34,922,616.81
  5. Step 5: Solve for x
    x = 34,922,616.81/8,338.32
  6. Step 6: Final answer
    x = 4,188.21

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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.