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Finding the Fourth Proportional to 36,486.78, 50,351.72 and 19,719.78

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Solution

The fourth proportional to 36,486.78, 50,351.72 and 19,719.78 is: 27,213.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,486.78 : 50,351.72 = 19,719.78 : x
  2. Step 2: Convert to fraction form
    36,486.78/50,351.72 = 19,719.78/x
  3. Step 3: Cross multiply
    36,486.78x = 50,351.72 × 19,719.78
  4. Step 4: Simplify right side
    36,486.78x = 992,924,841.02
  5. Step 5: Solve for x
    x = 992,924,841.02/36,486.78
  6. Step 6: Final answer
    x = 27,213.28

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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.