Home / 21,879.36-30,193.44-11,943.36

Finding the Fourth Proportional to 21,879.36, 30,193.44 and 11,943.36

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Solution

The fourth proportional to 21,879.36, 30,193.44 and 11,943.36 is: 16,481.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,879.36 : 30,193.44 = 11,943.36 : x
  2. Step 2: Convert to fraction form
    21,879.36/30,193.44 = 11,943.36/x
  3. Step 3: Cross multiply
    21,879.36x = 30,193.44 × 11,943.36
  4. Step 4: Simplify right side
    21,879.36x = 360,611,123.56
  5. Step 5: Solve for x
    x = 360,611,123.56/21,879.36
  6. Step 6: Final answer
    x = 16,481.79

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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.