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Finding the Fourth Proportional to 8,629.70, 12,067 and 8,629.70

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Solution

The fourth proportional to 8,629.70, 12,067 and 8,629.70 is: 12,067

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,629.70 : 12,067 = 8,629.70 : x
  2. Step 2: Convert to fraction form
    8,629.70/12,067 = 8,629.70/x
  3. Step 3: Cross multiply
    8,629.70x = 12,067 × 8,629.70
  4. Step 4: Simplify right side
    8,629.70x = 104,134,589.90
  5. Step 5: Solve for x
    x = 104,134,589.90/8,629.70
  6. Step 6: Final answer
    x = 12,067

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.