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Finding the Fourth Proportional to 18,703.19, 25,819.76 and 11,631.89

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Solution

The fourth proportional to 18,703.19, 25,819.76 and 11,631.89 is: 16,057.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,703.19 : 25,819.76 = 11,631.89 : x
  2. Step 2: Convert to fraction form
    18,703.19/25,819.76 = 11,631.89/x
  3. Step 3: Cross multiply
    18,703.19x = 25,819.76 × 11,631.89
  4. Step 4: Simplify right side
    18,703.19x = 300,332,608.15
  5. Step 5: Solve for x
    x = 300,332,608.15/18,703.19
  6. Step 6: Final answer
    x = 16,057.83

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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.