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Finding the Fourth Proportional to 8,786, 13,179 and 2,629.84

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Solution

The fourth proportional to 8,786, 13,179 and 2,629.84 is: 3,944.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,786 : 13,179 = 2,629.84 : x
  2. Step 2: Convert to fraction form
    8,786/13,179 = 2,629.84/x
  3. Step 3: Cross multiply
    8,786x = 13,179 × 2,629.84
  4. Step 4: Simplify right side
    8,786x = 34,658,661.36
  5. Step 5: Solve for x
    x = 34,658,661.36/8,786
  6. Step 6: Final answer
    x = 3,944.76

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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.