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Finding the Fourth Proportional to 18,811.62, 25,954.92 and 11,251.29

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Solution

The fourth proportional to 18,811.62, 25,954.92 and 11,251.29 is: 15,523.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,811.62 : 25,954.92 = 11,251.29 : x
  2. Step 2: Convert to fraction form
    18,811.62/25,954.92 = 11,251.29/x
  3. Step 3: Cross multiply
    18,811.62x = 25,954.92 × 11,251.29
  4. Step 4: Simplify right side
    18,811.62x = 292,026,331.85
  5. Step 5: Solve for x
    x = 292,026,331.85/18,811.62
  6. Step 6: Final answer
    x = 15,523.72

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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.