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Finding the Fourth Proportional to 18,751.68, 28,171.24 and 10,965.96

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Solution

The fourth proportional to 18,751.68, 28,171.24 and 10,965.96 is: 16,474.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.68 : 28,171.24 = 10,965.96 : x
  2. Step 2: Convert to fraction form
    18,751.68/28,171.24 = 10,965.96/x
  3. Step 3: Cross multiply
    18,751.68x = 28,171.24 × 10,965.96
  4. Step 4: Simplify right side
    18,751.68x = 308,924,690.99
  5. Step 5: Solve for x
    x = 308,924,690.99/18,751.68
  6. Step 6: Final answer
    x = 16,474.51

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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.