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Finding the Fourth Proportional to 22,518.40, 33,712.80 and 21,236.80

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Solution

The fourth proportional to 22,518.40, 33,712.80 and 21,236.80 is: 31,794.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,518.40 : 33,712.80 = 21,236.80 : x
  2. Step 2: Convert to fraction form
    22,518.40/33,712.80 = 21,236.80/x
  3. Step 3: Cross multiply
    22,518.40x = 33,712.80 × 21,236.80
  4. Step 4: Simplify right side
    22,518.40x = 715,951,991.04
  5. Step 5: Solve for x
    x = 715,951,991.04/22,518.40
  6. Step 6: Final answer
    x = 31,794.09

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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.