Home / 20,660.96-30,965.17-10,128.43

Finding the Fourth Proportional to 20,660.96, 30,965.17 and 10,128.43

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Solution

The fourth proportional to 20,660.96, 30,965.17 and 10,128.43 is: 15,179.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,660.96 : 30,965.17 = 10,128.43 : x
  2. Step 2: Convert to fraction form
    20,660.96/30,965.17 = 10,128.43/x
  3. Step 3: Cross multiply
    20,660.96x = 30,965.17 × 10,128.43
  4. Step 4: Simplify right side
    20,660.96x = 313,628,556.78
  5. Step 5: Solve for x
    x = 313,628,556.78/20,660.96
  6. Step 6: Final answer
    x = 15,179.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.