Home / 20,704.75-28,581.14-15,670.37

Finding the Fourth Proportional to 20,704.75, 28,581.14 and 15,670.37

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Solution

The fourth proportional to 20,704.75, 28,581.14 and 15,670.37 is: 21,631.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,704.75 : 28,581.14 = 15,670.37 : x
  2. Step 2: Convert to fraction form
    20,704.75/28,581.14 = 15,670.37/x
  3. Step 3: Cross multiply
    20,704.75x = 28,581.14 × 15,670.37
  4. Step 4: Simplify right side
    20,704.75x = 447,876,960.47
  5. Step 5: Solve for x
    x = 447,876,960.47/20,704.75
  6. Step 6: Final answer
    x = 21,631.61

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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.