Home / 54,015.76-81,015.32-20,751.49

Finding the Fourth Proportional to 54,015.76, 81,015.32 and 20,751.49

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Solution

The fourth proportional to 54,015.76, 81,015.32 and 20,751.49 is: 31,124.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    54,015.76 : 81,015.32 = 20,751.49 : x
  2. Step 2: Convert to fraction form
    54,015.76/81,015.32 = 20,751.49/x
  3. Step 3: Cross multiply
    54,015.76x = 81,015.32 × 20,751.49
  4. Step 4: Simplify right side
    54,015.76x = 1,681,188,755.97
  5. Step 5: Solve for x
    x = 1,681,188,755.97/54,015.76
  6. Step 6: Final answer
    x = 31,124.04

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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.