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Finding the Fourth Proportional to 18,081.21, 27,163.44 and 12,829.26

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Solution

The fourth proportional to 18,081.21, 27,163.44 and 12,829.26 is: 19,273.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,081.21 : 27,163.44 = 12,829.26 : x
  2. Step 2: Convert to fraction form
    18,081.21/27,163.44 = 12,829.26/x
  3. Step 3: Cross multiply
    18,081.21x = 27,163.44 × 12,829.26
  4. Step 4: Simplify right side
    18,081.21x = 348,486,834.25
  5. Step 5: Solve for x
    x = 348,486,834.25/18,081.21
  6. Step 6: Final answer
    x = 19,273.42

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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.