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Finding the Fourth Proportional to 18,221.67, 25,147.80 and 11,152.80

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Solution

The fourth proportional to 18,221.67, 25,147.80 and 11,152.80 is: 15,392.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,221.67 : 25,147.80 = 11,152.80 : x
  2. Step 2: Convert to fraction form
    18,221.67/25,147.80 = 11,152.80/x
  3. Step 3: Cross multiply
    18,221.67x = 25,147.80 × 11,152.80
  4. Step 4: Simplify right side
    18,221.67x = 280,468,383.84
  5. Step 5: Solve for x
    x = 280,468,383.84/18,221.67
  6. Step 6: Final answer
    x = 15,392.02

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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.