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Finding the Fourth Proportional to 8,843.80, 12,189 and 7,159

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Solution

The fourth proportional to 8,843.80, 12,189 and 7,159 is: 9,866.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,843.80 : 12,189 = 7,159 : x
  2. Step 2: Convert to fraction form
    8,843.80/12,189 = 7,159/x
  3. Step 3: Cross multiply
    8,843.80x = 12,189 × 7,159
  4. Step 4: Simplify right side
    8,843.80x = 87,261,051
  5. Step 5: Solve for x
    x = 87,261,051/8,843.80
  6. Step 6: Final answer
    x = 9,866.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.