Home / 31,687.60-43,729.92-18,257.80

Finding the Fourth Proportional to 31,687.60, 43,729.92 and 18,257.80

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Solution

The fourth proportional to 31,687.60, 43,729.92 and 18,257.80 is: 25,196.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,687.60 : 43,729.92 = 18,257.80 : x
  2. Step 2: Convert to fraction form
    31,687.60/43,729.92 = 18,257.80/x
  3. Step 3: Cross multiply
    31,687.60x = 43,729.92 × 18,257.80
  4. Step 4: Simplify right side
    31,687.60x = 798,412,133.38
  5. Step 5: Solve for x
    x = 798,412,133.38/31,687.60
  6. Step 6: Final answer
    x = 25,196.36

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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.