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Finding the Fourth Proportional to 20,425.68, 30,608.82 and 11,057.76

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Solution

The fourth proportional to 20,425.68, 30,608.82 and 11,057.76 is: 16,570.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.68 : 30,608.82 = 11,057.76 : x
  2. Step 2: Convert to fraction form
    20,425.68/30,608.82 = 11,057.76/x
  3. Step 3: Cross multiply
    20,425.68x = 30,608.82 × 11,057.76
  4. Step 4: Simplify right side
    20,425.68x = 338,464,985.44
  5. Step 5: Solve for x
    x = 338,464,985.44/20,425.68
  6. Step 6: Final answer
    x = 16,570.56

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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.