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Finding the Fourth Proportional to 18,751.96, 28,119.24 and 6,902.74

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Solution

The fourth proportional to 18,751.96, 28,119.24 and 6,902.74 is: 10,350.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,751.96 : 28,119.24 = 6,902.74 : x
  2. Step 2: Convert to fraction form
    18,751.96/28,119.24 = 6,902.74/x
  3. Step 3: Cross multiply
    18,751.96x = 28,119.24 × 6,902.74
  4. Step 4: Simplify right side
    18,751.96x = 194,099,802.72
  5. Step 5: Solve for x
    x = 194,099,802.72/18,751.96
  6. Step 6: Final answer
    x = 10,350.91

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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.