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Finding the Fourth Proportional to 9,081.81, 13,610.77 and 8,489.90

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Solution

The fourth proportional to 9,081.81, 13,610.77 and 8,489.90 is: 12,723.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,081.81 : 13,610.77 = 8,489.90 : x
  2. Step 2: Convert to fraction form
    9,081.81/13,610.77 = 8,489.90/x
  3. Step 3: Cross multiply
    9,081.81x = 13,610.77 × 8,489.90
  4. Step 4: Simplify right side
    9,081.81x = 115,554,089.03
  5. Step 5: Solve for x
    x = 115,554,089.03/9,081.81
  6. Step 6: Final answer
    x = 12,723.68

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1.5x scale

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.