Home / 20,221.45-30,285.29-19,520.80

Finding the Fourth Proportional to 20,221.45, 30,285.29 and 19,520.80

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Solution

The fourth proportional to 20,221.45, 30,285.29 and 19,520.80 is: 29,235.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.45 : 30,285.29 = 19,520.80 : x
  2. Step 2: Convert to fraction form
    20,221.45/30,285.29 = 19,520.80/x
  3. Step 3: Cross multiply
    20,221.45x = 30,285.29 × 19,520.80
  4. Step 4: Simplify right side
    20,221.45x = 591,193,062.12
  5. Step 5: Solve for x
    x = 591,193,062.12/20,221.45
  6. Step 6: Final answer
    x = 29,235.94

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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.