Home / 20,661.08-28,512.12-11,229.70

Finding the Fourth Proportional to 20,661.08, 28,512.12 and 11,229.70

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Solution

The fourth proportional to 20,661.08, 28,512.12 and 11,229.70 is: 15,496.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.08 : 28,512.12 = 11,229.70 : x
  2. Step 2: Convert to fraction form
    20,661.08/28,512.12 = 11,229.70/x
  3. Step 3: Cross multiply
    20,661.08x = 28,512.12 × 11,229.70
  4. Step 4: Simplify right side
    20,661.08x = 320,182,553.96
  5. Step 5: Solve for x
    x = 320,182,553.96/20,661.08
  6. Step 6: Final answer
    x = 15,496.89

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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.