Home / 20,618.39-28,453.20-11,665.82

Finding the Fourth Proportional to 20,618.39, 28,453.20 and 11,665.82

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Solution

The fourth proportional to 20,618.39, 28,453.20 and 11,665.82 is: 16,098.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,618.39 : 28,453.20 = 11,665.82 : x
  2. Step 2: Convert to fraction form
    20,618.39/28,453.20 = 11,665.82/x
  3. Step 3: Cross multiply
    20,618.39x = 28,453.20 × 11,665.82
  4. Step 4: Simplify right side
    20,618.39x = 331,929,909.62
  5. Step 5: Solve for x
    x = 331,929,909.62/20,618.39
  6. Step 6: Final answer
    x = 16,098.73

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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.