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Finding the Fourth Proportional to 18,211.20, 27,273.60 and 11,212.80

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Solution

The fourth proportional to 18,211.20, 27,273.60 and 11,212.80 is: 16,792.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,211.20 : 27,273.60 = 11,212.80 : x
  2. Step 2: Convert to fraction form
    18,211.20/27,273.60 = 11,212.80/x
  3. Step 3: Cross multiply
    18,211.20x = 27,273.60 × 11,212.80
  4. Step 4: Simplify right side
    18,211.20x = 305,813,422.08
  5. Step 5: Solve for x
    x = 305,813,422.08/18,211.20
  6. Step 6: Final answer
    x = 16,792.60

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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.