Home / 20,620.97-28,455.37-12,123.44

Finding the Fourth Proportional to 20,620.97, 28,455.37 and 12,123.44

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Solution

The fourth proportional to 20,620.97, 28,455.37 and 12,123.44 is: 16,729.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.97 : 28,455.37 = 12,123.44 : x
  2. Step 2: Convert to fraction form
    20,620.97/28,455.37 = 12,123.44/x
  3. Step 3: Cross multiply
    20,620.97x = 28,455.37 × 12,123.44
  4. Step 4: Simplify right side
    20,620.97x = 344,976,798.29
  5. Step 5: Solve for x
    x = 344,976,798.29/20,620.97
  6. Step 6: Final answer
    x = 16,729.42

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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.