Home / 20,500.54-30,731.61-11,126.80

Finding the Fourth Proportional to 20,500.54, 30,731.61 and 11,126.80

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Solution

The fourth proportional to 20,500.54, 30,731.61 and 11,126.80 is: 16,679.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,500.54 : 30,731.61 = 11,126.80 : x
  2. Step 2: Convert to fraction form
    20,500.54/30,731.61 = 11,126.80/x
  3. Step 3: Cross multiply
    20,500.54x = 30,731.61 × 11,126.80
  4. Step 4: Simplify right side
    20,500.54x = 341,944,478.15
  5. Step 5: Solve for x
    x = 341,944,478.15/20,500.54
  6. Step 6: Final answer
    x = 16,679.78

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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.