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Finding the Fourth Proportional to 33,290.64, 45,921.05 and 21,956.11

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Solution

The fourth proportional to 33,290.64, 45,921.05 and 21,956.11 is: 30,286.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,290.64 : 45,921.05 = 21,956.11 : x
  2. Step 2: Convert to fraction form
    33,290.64/45,921.05 = 21,956.11/x
  3. Step 3: Cross multiply
    33,290.64x = 45,921.05 × 21,956.11
  4. Step 4: Simplify right side
    33,290.64x = 1,008,247,400.53
  5. Step 5: Solve for x
    x = 1,008,247,400.53/33,290.64
  6. Step 6: Final answer
    x = 30,286.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.