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Finding the Fourth Proportional to 18,751.96, 25,734.80 and 16,979.68

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Solution

The fourth proportional to 18,751.96, 25,734.80 and 16,979.68 is: 23,302.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.96 : 25,734.80 = 16,979.68 : x
  2. Step 2: Convert to fraction form
    18,751.96/25,734.80 = 16,979.68/x
  3. Step 3: Cross multiply
    18,751.96x = 25,734.80 × 16,979.68
  4. Step 4: Simplify right side
    18,751.96x = 436,968,668.86
  5. Step 5: Solve for x
    x = 436,968,668.86/18,751.96
  6. Step 6: Final answer
    x = 23,302.56

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.