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Finding the Fourth Proportional to 18,751.21, 25,896.03 and 16,221.17

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Solution

The fourth proportional to 18,751.21, 25,896.03 and 16,221.17 is: 22,401.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.21 : 25,896.03 = 16,221.17 : x
  2. Step 2: Convert to fraction form
    18,751.21/25,896.03 = 16,221.17/x
  3. Step 3: Cross multiply
    18,751.21x = 25,896.03 × 16,221.17
  4. Step 4: Simplify right side
    18,751.21x = 420,063,904.96
  5. Step 5: Solve for x
    x = 420,063,904.96/18,751.21
  6. Step 6: Final answer
    x = 22,401.97

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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.