Home / 54,418.82-81,612.77-21,131.78

Finding the Fourth Proportional to 54,418.82, 81,612.77 and 21,131.78

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Solution

The fourth proportional to 54,418.82, 81,612.77 and 21,131.78 is: 31,691.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,418.82 : 81,612.77 = 21,131.78 : x
  2. Step 2: Convert to fraction form
    54,418.82/81,612.77 = 21,131.78/x
  3. Step 3: Cross multiply
    54,418.82x = 81,612.77 × 21,131.78
  4. Step 4: Simplify right side
    54,418.82x = 1,724,622,587.11
  5. Step 5: Solve for x
    x = 1,724,622,587.11/54,418.82
  6. Step 6: Final answer
    x = 31,691.66

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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.