Home / 20,493.76-28,281.33-11,997.47

Finding the Fourth Proportional to 20,493.76, 28,281.33 and 11,997.47

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Solution

The fourth proportional to 20,493.76, 28,281.33 and 11,997.47 is: 16,556.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,493.76 : 28,281.33 = 11,997.47 : x
  2. Step 2: Convert to fraction form
    20,493.76/28,281.33 = 11,997.47/x
  3. Step 3: Cross multiply
    20,493.76x = 28,281.33 × 11,997.47
  4. Step 4: Simplify right side
    20,493.76x = 339,304,286.11
  5. Step 5: Solve for x
    x = 339,304,286.11/20,493.76
  6. Step 6: Final answer
    x = 16,556.47

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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.