Home / 20,949.16-28,910.18-11,517.64

Finding the Fourth Proportional to 20,949.16, 28,910.18 and 11,517.64

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Solution

The fourth proportional to 20,949.16, 28,910.18 and 11,517.64 is: 15,894.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.16 : 28,910.18 = 11,517.64 : x
  2. Step 2: Convert to fraction form
    20,949.16/28,910.18 = 11,517.64/x
  3. Step 3: Cross multiply
    20,949.16x = 28,910.18 × 11,517.64
  4. Step 4: Simplify right side
    20,949.16x = 332,977,045.58
  5. Step 5: Solve for x
    x = 332,977,045.58/20,949.16
  6. Step 6: Final answer
    x = 15,894.53

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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.