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Finding the Fourth Proportional to 18,709.56, 25,819.26 and 10,751.28

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Solution

The fourth proportional to 18,709.56, 25,819.26 and 10,751.28 is: 14,836.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,709.56 : 25,819.26 = 10,751.28 : x
  2. Step 2: Convert to fraction form
    18,709.56/25,819.26 = 10,751.28/x
  3. Step 3: Cross multiply
    18,709.56x = 25,819.26 × 10,751.28
  4. Step 4: Simplify right side
    18,709.56x = 277,590,093.65
  5. Step 5: Solve for x
    x = 277,590,093.65/18,709.56
  6. Step 6: Final answer
    x = 14,836.81

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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.