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Finding the Fourth Proportional to 36,388.71, 50,208.84 and 21,278.43

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Solution

The fourth proportional to 36,388.71, 50,208.84 and 21,278.43 is: 29,359.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,388.71 : 50,208.84 = 21,278.43 : x
  2. Step 2: Convert to fraction form
    36,388.71/50,208.84 = 21,278.43/x
  3. Step 3: Cross multiply
    36,388.71x = 50,208.84 × 21,278.43
  4. Step 4: Simplify right side
    36,388.71x = 1,068,365,287.32
  5. Step 5: Solve for x
    x = 1,068,365,287.32/36,388.71
  6. Step 6: Final answer
    x = 29,359.80

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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.