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Finding the Fourth Proportional to 22,619.60, 33,900.60 and 20,142.80

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Solution

The fourth proportional to 22,619.60, 33,900.60 and 20,142.80 is: 30,188.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,619.60 : 33,900.60 = 20,142.80 : x
  2. Step 2: Convert to fraction form
    22,619.60/33,900.60 = 20,142.80/x
  3. Step 3: Cross multiply
    22,619.60x = 33,900.60 × 20,142.80
  4. Step 4: Simplify right side
    22,619.60x = 682,853,005.68
  5. Step 5: Solve for x
    x = 682,853,005.68/22,619.60
  6. Step 6: Final answer
    x = 30,188.55

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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.