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Finding the Fourth Proportional to 20,626.92, 30,943.46 and 8,780.60

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Solution

The fourth proportional to 20,626.92, 30,943.46 and 8,780.60 is: 13,172.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,626.92 : 30,943.46 = 8,780.60 : x
  2. Step 2: Convert to fraction form
    20,626.92/30,943.46 = 8,780.60/x
  3. Step 3: Cross multiply
    20,626.92x = 30,943.46 × 8,780.60
  4. Step 4: Simplify right side
    20,626.92x = 271,702,144.88
  5. Step 5: Solve for x
    x = 271,702,144.88/20,626.92
  6. Step 6: Final answer
    x = 13,172.21

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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.