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Finding the Fourth Proportional to 20,589.62, 30,890.19 and 8,101.94

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Solution

The fourth proportional to 20,589.62, 30,890.19 and 8,101.94 is: 12,155.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,589.62 : 30,890.19 = 8,101.94 : x
  2. Step 2: Convert to fraction form
    20,589.62/30,890.19 = 8,101.94/x
  3. Step 3: Cross multiply
    20,589.62x = 30,890.19 × 8,101.94
  4. Step 4: Simplify right side
    20,589.62x = 250,270,465.97
  5. Step 5: Solve for x
    x = 250,270,465.97/20,589.62
  6. Step 6: Final answer
    x = 12,155.18

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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.