Home / 20,861.20-28,788.48-12,367.47

Finding the Fourth Proportional to 20,861.20, 28,788.48 and 12,367.47

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Solution

The fourth proportional to 20,861.20, 28,788.48 and 12,367.47 is: 17,067.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.20 : 28,788.48 = 12,367.47 : x
  2. Step 2: Convert to fraction form
    20,861.20/28,788.48 = 12,367.47/x
  3. Step 3: Cross multiply
    20,861.20x = 28,788.48 × 12,367.47
  4. Step 4: Simplify right side
    20,861.20x = 356,040,678.04
  5. Step 5: Solve for x
    x = 356,040,678.04/20,861.20
  6. Step 6: Final answer
    x = 17,067.13

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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.