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Finding the Fourth Proportional to 18,163.61, 27,228.97 and 12,619.55

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Solution

The fourth proportional to 18,163.61, 27,228.97 and 12,619.55 is: 18,917.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,163.61 : 27,228.97 = 12,619.55 : x
  2. Step 2: Convert to fraction form
    18,163.61/27,228.97 = 12,619.55/x
  3. Step 3: Cross multiply
    18,163.61x = 27,228.97 × 12,619.55
  4. Step 4: Simplify right side
    18,163.61x = 343,617,348.36
  5. Step 5: Solve for x
    x = 343,617,348.36/18,163.61
  6. Step 6: Final answer
    x = 18,917.90

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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.