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Finding the Fourth Proportional to 20,593.76, 30,900.99 and 8,122.73

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Solution

The fourth proportional to 20,593.76, 30,900.99 and 8,122.73 is: 12,188.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,593.76 : 30,900.99 = 8,122.73 : x
  2. Step 2: Convert to fraction form
    20,593.76/30,900.99 = 8,122.73/x
  3. Step 3: Cross multiply
    20,593.76x = 30,900.99 × 8,122.73
  4. Step 4: Simplify right side
    20,593.76x = 251,000,398.50
  5. Step 5: Solve for x
    x = 251,000,398.50/20,593.76
  6. Step 6: Final answer
    x = 12,188.18

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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.