Home / 22,221.20-33,331.80-21,299.60

Finding the Fourth Proportional to 22,221.20, 33,331.80 and 21,299.60

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Solution

The fourth proportional to 22,221.20, 33,331.80 and 21,299.60 is: 31,949.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,221.20 : 33,331.80 = 21,299.60 : x
  2. Step 2: Convert to fraction form
    22,221.20/33,331.80 = 21,299.60/x
  3. Step 3: Cross multiply
    22,221.20x = 33,331.80 × 21,299.60
  4. Step 4: Simplify right side
    22,221.20x = 709,954,007.28
  5. Step 5: Solve for x
    x = 709,954,007.28/22,221.20
  6. Step 6: Final answer
    x = 31,949.40

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Double scale
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Similar ratio
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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.