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Finding the Fourth Proportional to 20,608.45, 30,899.02 and 7,459.11

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Solution

The fourth proportional to 20,608.45, 30,899.02 and 7,459.11 is: 11,183.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,608.45 : 30,899.02 = 7,459.11 : x
  2. Step 2: Convert to fraction form
    20,608.45/30,899.02 = 7,459.11/x
  3. Step 3: Cross multiply
    20,608.45x = 30,899.02 × 7,459.11
  4. Step 4: Simplify right side
    20,608.45x = 230,479,189.07
  5. Step 5: Solve for x
    x = 230,479,189.07/20,608.45
  6. Step 6: Final answer
    x = 11,183.72

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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.