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Finding the Fourth Proportional to 20,201.60, 30,302.40 and 12,414.80

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Solution

The fourth proportional to 20,201.60, 30,302.40 and 12,414.80 is: 18,622.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,201.60 : 30,302.40 = 12,414.80 : x
  2. Step 2: Convert to fraction form
    20,201.60/30,302.40 = 12,414.80/x
  3. Step 3: Cross multiply
    20,201.60x = 30,302.40 × 12,414.80
  4. Step 4: Simplify right side
    20,201.60x = 376,198,235.52
  5. Step 5: Solve for x
    x = 376,198,235.52/20,201.60
  6. Step 6: Final answer
    x = 18,622.20

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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.