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Finding the Fourth Proportional to 20,610.72, 30,910.01 and 8,764.47

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Solution

The fourth proportional to 20,610.72, 30,910.01 and 8,764.47 is: 13,144.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,610.72 : 30,910.01 = 8,764.47 : x
  2. Step 2: Convert to fraction form
    20,610.72/30,910.01 = 8,764.47/x
  3. Step 3: Cross multiply
    20,610.72x = 30,910.01 × 8,764.47
  4. Step 4: Simplify right side
    20,610.72x = 270,909,811.52
  5. Step 5: Solve for x
    x = 270,909,811.52/20,610.72
  6. Step 6: Final answer
    x = 13,144.12

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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.