Home / 20,115.71-27,759.98-11,163.79

Finding the Fourth Proportional to 20,115.71, 27,759.98 and 11,163.79

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Solution

The fourth proportional to 20,115.71, 27,759.98 and 11,163.79 is: 15,406.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.71 : 27,759.98 = 11,163.79 : x
  2. Step 2: Convert to fraction form
    20,115.71/27,759.98 = 11,163.79/x
  3. Step 3: Cross multiply
    20,115.71x = 27,759.98 × 11,163.79
  4. Step 4: Simplify right side
    20,115.71x = 309,906,392.51
  5. Step 5: Solve for x
    x = 309,906,392.51/20,115.71
  6. Step 6: Final answer
    x = 15,406.19

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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.