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Finding the Fourth Proportional to 20,608.20, 30,905.10 and 10,744.20

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Solution

The fourth proportional to 20,608.20, 30,905.10 and 10,744.20 is: 16,112.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.20 : 30,905.10 = 10,744.20 : x
  2. Step 2: Convert to fraction form
    20,608.20/30,905.10 = 10,744.20/x
  3. Step 3: Cross multiply
    20,608.20x = 30,905.10 × 10,744.20
  4. Step 4: Simplify right side
    20,608.20x = 332,050,575.42
  5. Step 5: Solve for x
    x = 332,050,575.42/20,608.20
  6. Step 6: Final answer
    x = 16,112.55

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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.