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Finding the Fourth Proportional to 20,505.44, 30,747.22 and 10,620.20

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Solution

The fourth proportional to 20,505.44, 30,747.22 and 10,620.20 is: 15,924.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,505.44 : 30,747.22 = 10,620.20 : x
  2. Step 2: Convert to fraction form
    20,505.44/30,747.22 = 10,620.20/x
  3. Step 3: Cross multiply
    20,505.44x = 30,747.22 × 10,620.20
  4. Step 4: Simplify right side
    20,505.44x = 326,541,419.01
  5. Step 5: Solve for x
    x = 326,541,419.01/20,505.44
  6. Step 6: Final answer
    x = 15,924.63

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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.