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Finding the Fourth Proportional to 11,512.20, 17,231.85 and 11,512.20

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Solution

The fourth proportional to 11,512.20, 17,231.85 and 11,512.20 is: 17,231.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,512.20 : 17,231.85 = 11,512.20 : x
  2. Step 2: Convert to fraction form
    11,512.20/17,231.85 = 11,512.20/x
  3. Step 3: Cross multiply
    11,512.20x = 17,231.85 × 11,512.20
  4. Step 4: Simplify right side
    11,512.20x = 198,376,503.57
  5. Step 5: Solve for x
    x = 198,376,503.57/11,512.20
  6. Step 6: Final answer
    x = 17,231.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.