Home / 15,879.44-21,906.45-9,912.58

Finding the Fourth Proportional to 15,879.44, 21,906.45 and 9,912.58

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Solution

The fourth proportional to 15,879.44, 21,906.45 and 9,912.58 is: 13,674.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,879.44 : 21,906.45 = 9,912.58 : x
  2. Step 2: Convert to fraction form
    15,879.44/21,906.45 = 9,912.58/x
  3. Step 3: Cross multiply
    15,879.44x = 21,906.45 × 9,912.58
  4. Step 4: Simplify right side
    15,879.44x = 217,149,383.37
  5. Step 5: Solve for x
    x = 217,149,383.37/15,879.44
  6. Step 6: Final answer
    x = 13,674.87

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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.