Home / 20,661.29-28,512.75-11,229.84

Finding the Fourth Proportional to 20,661.29, 28,512.75 and 11,229.84

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Solution

The fourth proportional to 20,661.29, 28,512.75 and 11,229.84 is: 15,497.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.29 : 28,512.75 = 11,229.84 : x
  2. Step 2: Convert to fraction form
    20,661.29/28,512.75 = 11,229.84/x
  3. Step 3: Cross multiply
    20,661.29x = 28,512.75 × 11,229.84
  4. Step 4: Simplify right side
    20,661.29x = 320,193,620.46
  5. Step 5: Solve for x
    x = 320,193,620.46/20,661.29
  6. Step 6: Final answer
    x = 15,497.27

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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.