Home / 20,661.30-28,512.68-11,229.80

Finding the Fourth Proportional to 20,661.30, 28,512.68 and 11,229.80

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Solution

The fourth proportional to 20,661.30, 28,512.68 and 11,229.80 is: 15,497.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.30 : 28,512.68 = 11,229.80 : x
  2. Step 2: Convert to fraction form
    20,661.30/28,512.68 = 11,229.80/x
  3. Step 3: Cross multiply
    20,661.30x = 28,512.68 × 11,229.80
  4. Step 4: Simplify right side
    20,661.30x = 320,191,495.15
  5. Step 5: Solve for x
    x = 320,191,495.15/20,661.30
  6. Step 6: Final answer
    x = 15,497.16

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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.