Home / 20,517.27-28,315.97-12,564.78

Finding the Fourth Proportional to 20,517.27, 28,315.97 and 12,564.78

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Solution

The fourth proportional to 20,517.27, 28,315.97 and 12,564.78 is: 17,340.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,517.27 : 28,315.97 = 12,564.78 : x
  2. Step 2: Convert to fraction form
    20,517.27/28,315.97 = 12,564.78/x
  3. Step 3: Cross multiply
    20,517.27x = 28,315.97 × 12,564.78
  4. Step 4: Simplify right side
    20,517.27x = 355,783,933.54
  5. Step 5: Solve for x
    x = 355,783,933.54/20,517.27
  6. Step 6: Final answer
    x = 17,340.71

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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.