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Finding the Fourth Proportional to 20,950.74, 28,910.48 and 12,452.48

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Solution

The fourth proportional to 20,950.74, 28,910.48 and 12,452.48 is: 17,183.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.74 : 28,910.48 = 12,452.48 : x
  2. Step 2: Convert to fraction form
    20,950.74/28,910.48 = 12,452.48/x
  3. Step 3: Cross multiply
    20,950.74x = 28,910.48 × 12,452.48
  4. Step 4: Simplify right side
    20,950.74x = 360,007,173.99
  5. Step 5: Solve for x
    x = 360,007,173.99/20,950.74
  6. Step 6: Final answer
    x = 17,183.51

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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.