Home / 20,968.62-31,419.99-9,872.70

Finding the Fourth Proportional to 20,968.62, 31,419.99 and 9,872.70

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Solution

The fourth proportional to 20,968.62, 31,419.99 and 9,872.70 is: 14,793.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,968.62 : 31,419.99 = 9,872.70 : x
  2. Step 2: Convert to fraction form
    20,968.62/31,419.99 = 9,872.70/x
  3. Step 3: Cross multiply
    20,968.62x = 31,419.99 × 9,872.70
  4. Step 4: Simplify right side
    20,968.62x = 310,200,135.27
  5. Step 5: Solve for x
    x = 310,200,135.27/20,968.62
  6. Step 6: Final answer
    x = 14,793.54

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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.