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Finding the Fourth Proportional to 20,538.82, 30,807.78 and 5,747.44

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Solution

The fourth proportional to 20,538.82, 30,807.78 and 5,747.44 is: 8,621.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,538.82 : 30,807.78 = 5,747.44 : x
  2. Step 2: Convert to fraction form
    20,538.82/30,807.78 = 5,747.44/x
  3. Step 3: Cross multiply
    20,538.82x = 30,807.78 × 5,747.44
  4. Step 4: Simplify right side
    20,538.82x = 177,065,867.08
  5. Step 5: Solve for x
    x = 177,065,867.08/20,538.82
  6. Step 6: Final answer
    x = 8,621.03

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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.