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Finding the Fourth Proportional to 18,808.22, 28,213.14 and 10,481.90

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Solution

The fourth proportional to 18,808.22, 28,213.14 and 10,481.90 is: 15,723.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,808.22 : 28,213.14 = 10,481.90 : x
  2. Step 2: Convert to fraction form
    18,808.22/28,213.14 = 10,481.90/x
  3. Step 3: Cross multiply
    18,808.22x = 28,213.14 × 10,481.90
  4. Step 4: Simplify right side
    18,808.22x = 295,727,171.10
  5. Step 5: Solve for x
    x = 295,727,171.10/18,808.22
  6. Step 6: Final answer
    x = 15,723.30

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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.