Home / 20,265.71-27,958.64-13,540.69

Finding the Fourth Proportional to 20,265.71, 27,958.64 and 13,540.69

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Solution

The fourth proportional to 20,265.71, 27,958.64 and 13,540.69 is: 18,680.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,265.71 : 27,958.64 = 13,540.69 : x
  2. Step 2: Convert to fraction form
    20,265.71/27,958.64 = 13,540.69/x
  3. Step 3: Cross multiply
    20,265.71x = 27,958.64 × 13,540.69
  4. Step 4: Simplify right side
    20,265.71x = 378,579,201.29
  5. Step 5: Solve for x
    x = 378,579,201.29/20,265.71
  6. Step 6: Final answer
    x = 18,680.78

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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.