Home / 31,691.78-43,744.39-18,272.00

Finding the Fourth Proportional to 31,691.78, 43,744.39 and 18,272.00

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Solution

The fourth proportional to 31,691.78, 43,744.39 and 18,272.00 is: 25,220.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,691.78 : 43,744.39 = 18,272.00 : x
  2. Step 2: Convert to fraction form
    31,691.78/43,744.39 = 18,272.00/x
  3. Step 3: Cross multiply
    31,691.78x = 43,744.39 × 18,272.00
  4. Step 4: Simplify right side
    31,691.78x = 799,297,229.68
  5. Step 5: Solve for x
    x = 799,297,229.68/31,691.78
  6. Step 6: Final answer
    x = 25,220.96

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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.