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Finding the Fourth Proportional to 36,388.40, 54,553.80 and 19,972.40

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Solution

The fourth proportional to 36,388.40, 54,553.80 and 19,972.40 is: 29,942.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,388.40 : 54,553.80 = 19,972.40 : x
  2. Step 2: Convert to fraction form
    36,388.40/54,553.80 = 19,972.40/x
  3. Step 3: Cross multiply
    36,388.40x = 54,553.80 × 19,972.40
  4. Step 4: Simplify right side
    36,388.40x = 1,089,570,315.12
  5. Step 5: Solve for x
    x = 1,089,570,315.12/36,388.40
  6. Step 6: Final answer
    x = 29,942.79

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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.