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Finding the Fourth Proportional to 36,858.43, 55,243.90 and 21,243.79

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Solution

The fourth proportional to 36,858.43, 55,243.90 and 21,243.79 is: 31,840.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,858.43 : 55,243.90 = 21,243.79 : x
  2. Step 2: Convert to fraction form
    36,858.43/55,243.90 = 21,243.79/x
  3. Step 3: Cross multiply
    36,858.43x = 55,243.90 × 21,243.79
  4. Step 4: Simplify right side
    36,858.43x = 1,173,589,810.38
  5. Step 5: Solve for x
    x = 1,173,589,810.38/36,858.43
  6. Step 6: Final answer
    x = 31,840.47

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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.