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Finding the Fourth Proportional to 18,720.62, 25,834.44 and 10,764.40

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Solution

The fourth proportional to 18,720.62, 25,834.44 and 10,764.40 is: 14,854.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.62 : 25,834.44 = 10,764.40 : x
  2. Step 2: Convert to fraction form
    18,720.62/25,834.44 = 10,764.40/x
  3. Step 3: Cross multiply
    18,720.62x = 25,834.44 × 10,764.40
  4. Step 4: Simplify right side
    18,720.62x = 278,092,245.94
  5. Step 5: Solve for x
    x = 278,092,245.94/18,720.62
  6. Step 6: Final answer
    x = 14,854.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.