Home / 31,721.82-43,780.78-18,290.46

Finding the Fourth Proportional to 31,721.82, 43,780.78 and 18,290.46

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Solution

The fourth proportional to 31,721.82, 43,780.78 and 18,290.46 is: 25,243.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,721.82 : 43,780.78 = 18,290.46 : x
  2. Step 2: Convert to fraction form
    31,721.82/43,780.78 = 18,290.46/x
  3. Step 3: Cross multiply
    31,721.82x = 43,780.78 × 18,290.46
  4. Step 4: Simplify right side
    31,721.82x = 800,770,605.36
  5. Step 5: Solve for x
    x = 800,770,605.36/31,721.82
  6. Step 6: Final answer
    x = 25,243.53

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1.5x scale

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.