Home / 12,238.70-18,321.60-7,305.80

Finding the Fourth Proportional to 12,238.70, 18,321.60 and 7,305.80

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Solution

The fourth proportional to 12,238.70, 18,321.60 and 7,305.80 is: 10,936.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,238.70 : 18,321.60 = 7,305.80 : x
  2. Step 2: Convert to fraction form
    12,238.70/18,321.60 = 7,305.80/x
  3. Step 3: Cross multiply
    12,238.70x = 18,321.60 × 7,305.80
  4. Step 4: Simplify right side
    12,238.70x = 133,853,945.28
  5. Step 5: Solve for x
    x = 133,853,945.28/12,238.70
  6. Step 6: Final answer
    x = 10,936.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.