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Finding the Fourth Proportional to 20,559.78, 30,819.11 and 9,474.48

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Solution

The fourth proportional to 20,559.78, 30,819.11 and 9,474.48 is: 14,202.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,559.78 : 30,819.11 = 9,474.48 : x
  2. Step 2: Convert to fraction form
    20,559.78/30,819.11 = 9,474.48/x
  3. Step 3: Cross multiply
    20,559.78x = 30,819.11 × 9,474.48
  4. Step 4: Simplify right side
    20,559.78x = 291,994,993.94
  5. Step 5: Solve for x
    x = 291,994,993.94/20,559.78
  6. Step 6: Final answer
    x = 14,202.24

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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.