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Finding the Fourth Proportional to 20,601.05, 30,917.99 and 8,124.21

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Solution

The fourth proportional to 20,601.05, 30,917.99 and 8,124.21 is: 12,192.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,601.05 : 30,917.99 = 8,124.21 : x
  2. Step 2: Convert to fraction form
    20,601.05/30,917.99 = 8,124.21/x
  3. Step 3: Cross multiply
    20,601.05x = 30,917.99 × 8,124.21
  4. Step 4: Simplify right side
    20,601.05x = 251,184,243.54
  5. Step 5: Solve for x
    x = 251,184,243.54/20,601.05
  6. Step 6: Final answer
    x = 12,192.79

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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.