Home / 31,236.25-43,105.20-18,490.09

Finding the Fourth Proportional to 31,236.25, 43,105.20 and 18,490.09

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Solution

The fourth proportional to 31,236.25, 43,105.20 and 18,490.09 is: 25,515.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,236.25 : 43,105.20 = 18,490.09 : x
  2. Step 2: Convert to fraction form
    31,236.25/43,105.20 = 18,490.09/x
  3. Step 3: Cross multiply
    31,236.25x = 43,105.20 × 18,490.09
  4. Step 4: Simplify right side
    31,236.25x = 797,019,027.47
  5. Step 5: Solve for x
    x = 797,019,027.47/31,236.25
  6. Step 6: Final answer
    x = 25,515.84

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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.