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Finding the Fourth Proportional to 20,131.90, 30,201.90 and 16,867.60

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Solution

The fourth proportional to 20,131.90, 30,201.90 and 16,867.60 is: 25,304.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,131.90 : 30,201.90 = 16,867.60 : x
  2. Step 2: Convert to fraction form
    20,131.90/30,201.90 = 16,867.60/x
  3. Step 3: Cross multiply
    20,131.90x = 30,201.90 × 16,867.60
  4. Step 4: Simplify right side
    20,131.90x = 509,433,568.44
  5. Step 5: Solve for x
    x = 509,433,568.44/20,131.90
  6. Step 6: Final answer
    x = 25,304.79

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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.