Home / 20,519.73-28,310.58-12,553.65

Finding the Fourth Proportional to 20,519.73, 28,310.58 and 12,553.65

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Solution

The fourth proportional to 20,519.73, 28,310.58 and 12,553.65 is: 17,319.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,519.73 : 28,310.58 = 12,553.65 : x
  2. Step 2: Convert to fraction form
    20,519.73/28,310.58 = 12,553.65/x
  3. Step 3: Cross multiply
    20,519.73x = 28,310.58 × 12,553.65
  4. Step 4: Simplify right side
    20,519.73x = 355,401,112.62
  5. Step 5: Solve for x
    x = 355,401,112.62/20,519.73
  6. Step 6: Final answer
    x = 17,319.97

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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.