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Finding the Fourth Proportional to 13,086.80, 18,050.63 and 8,609.12

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Solution

The fourth proportional to 13,086.80, 18,050.63 and 8,609.12 is: 11,874.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,086.80 : 18,050.63 = 8,609.12 : x
  2. Step 2: Convert to fraction form
    13,086.80/18,050.63 = 8,609.12/x
  3. Step 3: Cross multiply
    13,086.80x = 18,050.63 × 8,609.12
  4. Step 4: Simplify right side
    13,086.80x = 155,400,039.75
  5. Step 5: Solve for x
    x = 155,400,039.75/13,086.80
  6. Step 6: Final answer
    x = 11,874.56

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