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Finding the Fourth Proportional to 18,975.96, 28,452.96 and 7,869.96

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Solution

The fourth proportional to 18,975.96, 28,452.96 and 7,869.96 is: 11,800.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,975.96 : 28,452.96 = 7,869.96 : x
  2. Step 2: Convert to fraction form
    18,975.96/28,452.96 = 7,869.96/x
  3. Step 3: Cross multiply
    18,975.96x = 28,452.96 × 7,869.96
  4. Step 4: Simplify right side
    18,975.96x = 223,923,657.08
  5. Step 5: Solve for x
    x = 223,923,657.08/18,975.96
  6. Step 6: Final answer
    x = 11,800.39

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1.5x scale

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.