Home / 31,806.72-43,890.24-18,375.36

Finding the Fourth Proportional to 31,806.72, 43,890.24 and 18,375.36

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Solution

The fourth proportional to 31,806.72, 43,890.24 and 18,375.36 is: 25,356.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,806.72 : 43,890.24 = 18,375.36 : x
  2. Step 2: Convert to fraction form
    31,806.72/43,890.24 = 18,375.36/x
  3. Step 3: Cross multiply
    31,806.72x = 43,890.24 × 18,375.36
  4. Step 4: Simplify right side
    31,806.72x = 806,498,960.49
  5. Step 5: Solve for x
    x = 806,498,960.49/31,806.72
  6. Step 6: Final answer
    x = 25,356.24

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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.