Home / 31,375.13-43,334.60-21,286.04

Finding the Fourth Proportional to 31,375.13, 43,334.60 and 21,286.04

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Solution

The fourth proportional to 31,375.13, 43,334.60 and 21,286.04 is: 29,399.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,375.13 : 43,334.60 = 21,286.04 : x
  2. Step 2: Convert to fraction form
    31,375.13/43,334.60 = 21,286.04/x
  3. Step 3: Cross multiply
    31,375.13x = 43,334.60 × 21,286.04
  4. Step 4: Simplify right side
    31,375.13x = 922,421,705.88
  5. Step 5: Solve for x
    x = 922,421,705.88/31,375.13
  6. Step 6: Final answer
    x = 29,399.78

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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.