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Finding the Fourth Proportional to 18,709.20, 25,819.08 and 10,211.49

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Solution

The fourth proportional to 18,709.20, 25,819.08 and 10,211.49 is: 14,092.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.20 : 25,819.08 = 10,211.49 : x
  2. Step 2: Convert to fraction form
    18,709.20/25,819.08 = 10,211.49/x
  3. Step 3: Cross multiply
    18,709.20x = 25,819.08 × 10,211.49
  4. Step 4: Simplify right side
    18,709.20x = 263,651,277.23
  5. Step 5: Solve for x
    x = 263,651,277.23/18,709.20
  6. Step 6: Final answer
    x = 14,092.07

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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.