Home / 20,511.20-30,781.20-8,832.80

Finding the Fourth Proportional to 20,511.20, 30,781.20 and 8,832.80

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Solution

The fourth proportional to 20,511.20, 30,781.20 and 8,832.80 is: 13,255.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,511.20 : 30,781.20 = 8,832.80 : x
  2. Step 2: Convert to fraction form
    20,511.20/30,781.20 = 8,832.80/x
  3. Step 3: Cross multiply
    20,511.20x = 30,781.20 × 8,832.80
  4. Step 4: Simplify right side
    20,511.20x = 271,884,183.36
  5. Step 5: Solve for x
    x = 271,884,183.36/20,511.20
  6. Step 6: Final answer
    x = 13,255.40

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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.