Home / 20,278.68-27,991.26-11,895

Finding the Fourth Proportional to 20,278.68, 27,991.26 and 11,895

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Solution

The fourth proportional to 20,278.68, 27,991.26 and 11,895 is: 16,419.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,278.68 : 27,991.26 = 11,895 : x
  2. Step 2: Convert to fraction form
    20,278.68/27,991.26 = 11,895/x
  3. Step 3: Cross multiply
    20,278.68x = 27,991.26 × 11,895
  4. Step 4: Simplify right side
    20,278.68x = 332,956,037.70
  5. Step 5: Solve for x
    x = 332,956,037.70/20,278.68
  6. Step 6: Final answer
    x = 16,419.02

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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.