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Finding the Fourth Proportional to 20,099.01, 30,147.90 and 5,308.01

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Solution

The fourth proportional to 20,099.01, 30,147.90 and 5,308.01 is: 7,961.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,099.01 : 30,147.90 = 5,308.01 : x
  2. Step 2: Convert to fraction form
    20,099.01/30,147.90 = 5,308.01/x
  3. Step 3: Cross multiply
    20,099.01x = 30,147.90 × 5,308.01
  4. Step 4: Simplify right side
    20,099.01x = 160,025,354.68
  5. Step 5: Solve for x
    x = 160,025,354.68/20,099.01
  6. Step 6: Final answer
    x = 7,961.85

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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.