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Finding the Fourth Proportional to 20,873.70, 28,805.94 and 11,922.39

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Solution

The fourth proportional to 20,873.70, 28,805.94 and 11,922.39 is: 16,453.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,873.70 : 28,805.94 = 11,922.39 : x
  2. Step 2: Convert to fraction form
    20,873.70/28,805.94 = 11,922.39/x
  3. Step 3: Cross multiply
    20,873.70x = 28,805.94 × 11,922.39
  4. Step 4: Simplify right side
    20,873.70x = 343,435,651.00
  5. Step 5: Solve for x
    x = 343,435,651.00/20,873.70
  6. Step 6: Final answer
    x = 16,453.03

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1.5x scale

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.