Home / 20,147.20-30,245.10-11,269.60

Finding the Fourth Proportional to 20,147.20, 30,245.10 and 11,269.60

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Solution

The fourth proportional to 20,147.20, 30,245.10 and 11,269.60 is: 16,917.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.20 : 30,245.10 = 11,269.60 : x
  2. Step 2: Convert to fraction form
    20,147.20/30,245.10 = 11,269.60/x
  3. Step 3: Cross multiply
    20,147.20x = 30,245.10 × 11,269.60
  4. Step 4: Simplify right side
    20,147.20x = 340,850,178.96
  5. Step 5: Solve for x
    x = 340,850,178.96/20,147.20
  6. Step 6: Final answer
    x = 16,917.99

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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.