Home / 20,649.62-28,503.18-12,151.28

Finding the Fourth Proportional to 20,649.62, 28,503.18 and 12,151.28

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Solution

The fourth proportional to 20,649.62, 28,503.18 and 12,151.28 is: 16,772.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.62 : 28,503.18 = 12,151.28 : x
  2. Step 2: Convert to fraction form
    20,649.62/28,503.18 = 12,151.28/x
  3. Step 3: Cross multiply
    20,649.62x = 28,503.18 × 12,151.28
  4. Step 4: Simplify right side
    20,649.62x = 346,350,121.07
  5. Step 5: Solve for x
    x = 346,350,121.07/20,649.62
  6. Step 6: Final answer
    x = 16,772.71

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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.