Home / 20,379.60-30,553.20-11,145.60

Finding the Fourth Proportional to 20,379.60, 30,553.20 and 11,145.60

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Solution

The fourth proportional to 20,379.60, 30,553.20 and 11,145.60 is: 16,709.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,379.60 : 30,553.20 = 11,145.60 : x
  2. Step 2: Convert to fraction form
    20,379.60/30,553.20 = 11,145.60/x
  3. Step 3: Cross multiply
    20,379.60x = 30,553.20 × 11,145.60
  4. Step 4: Simplify right side
    20,379.60x = 340,533,745.92
  5. Step 5: Solve for x
    x = 340,533,745.92/20,379.60
  6. Step 6: Final answer
    x = 16,709.54

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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.