Home / 20,949.57-28,910.32-11,517.93

Finding the Fourth Proportional to 20,949.57, 28,910.32 and 11,517.93

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Solution

The fourth proportional to 20,949.57, 28,910.32 and 11,517.93 is: 15,894.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,949.57 : 28,910.32 = 11,517.93 : x
  2. Step 2: Convert to fraction form
    20,949.57/28,910.32 = 11,517.93/x
  3. Step 3: Cross multiply
    20,949.57x = 28,910.32 × 11,517.93
  4. Step 4: Simplify right side
    20,949.57x = 332,987,013.24
  5. Step 5: Solve for x
    x = 332,987,013.24/20,949.57
  6. Step 6: Final answer
    x = 15,894.69

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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.