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Finding the Fourth Proportional to 22,269.80, 33,404.70 and 20,811.80

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Solution

The fourth proportional to 22,269.80, 33,404.70 and 20,811.80 is: 31,217.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,269.80 : 33,404.70 = 20,811.80 : x
  2. Step 2: Convert to fraction form
    22,269.80/33,404.70 = 20,811.80/x
  3. Step 3: Cross multiply
    22,269.80x = 33,404.70 × 20,811.80
  4. Step 4: Simplify right side
    22,269.80x = 695,211,935.46
  5. Step 5: Solve for x
    x = 695,211,935.46/22,269.80
  6. Step 6: Final answer
    x = 31,217.70

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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.