Home / 20,661.12-28,512.18-11,229.66

Finding the Fourth Proportional to 20,661.12, 28,512.18 and 11,229.66

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Solution

The fourth proportional to 20,661.12, 28,512.18 and 11,229.66 is: 15,496.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.12 : 28,512.18 = 11,229.66 : x
  2. Step 2: Convert to fraction form
    20,661.12/28,512.18 = 11,229.66/x
  3. Step 3: Cross multiply
    20,661.12x = 28,512.18 × 11,229.66
  4. Step 4: Simplify right side
    20,661.12x = 320,182,087.26
  5. Step 5: Solve for x
    x = 320,182,087.26/20,661.12
  6. Step 6: Final answer
    x = 15,496.84

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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.