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Finding the Fourth Proportional to 17,912.79, 26,828.20 and 8,559.38

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Solution

The fourth proportional to 17,912.79, 26,828.20 and 8,559.38 is: 12,819.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,912.79 : 26,828.20 = 8,559.38 : x
  2. Step 2: Convert to fraction form
    17,912.79/26,828.20 = 8,559.38/x
  3. Step 3: Cross multiply
    17,912.79x = 26,828.20 × 8,559.38
  4. Step 4: Simplify right side
    17,912.79x = 229,632,581.58
  5. Step 5: Solve for x
    x = 229,632,581.58/17,912.79
  6. Step 6: Final answer
    x = 12,819.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.