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Finding the Fourth Proportional to 20,630.58, 30,920.44 and 8,138.04

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Solution

The fourth proportional to 20,630.58, 30,920.44 and 8,138.04 is: 12,197.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,630.58 : 30,920.44 = 8,138.04 : x
  2. Step 2: Convert to fraction form
    20,630.58/30,920.44 = 8,138.04/x
  3. Step 3: Cross multiply
    20,630.58x = 30,920.44 × 8,138.04
  4. Step 4: Simplify right side
    20,630.58x = 251,631,777.54
  5. Step 5: Solve for x
    x = 251,631,777.54/20,630.58
  6. Step 6: Final answer
    x = 12,197.03

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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.