Home / 54,418.51-81,612.27-21,131.47

Finding the Fourth Proportional to 54,418.51, 81,612.27 and 21,131.47

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Solution

The fourth proportional to 54,418.51, 81,612.27 and 21,131.47 is: 31,691.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,418.51 : 81,612.27 = 21,131.47 : x
  2. Step 2: Convert to fraction form
    54,418.51/81,612.27 = 21,131.47/x
  3. Step 3: Cross multiply
    54,418.51x = 81,612.27 × 21,131.47
  4. Step 4: Simplify right side
    54,418.51x = 1,724,587,235.14
  5. Step 5: Solve for x
    x = 1,724,587,235.14/54,418.51
  6. Step 6: Final answer
    x = 31,691.19

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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.