Home / 20,859.54-28,792.20-11,911.92

Finding the Fourth Proportional to 20,859.54, 28,792.20 and 11,911.92

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Solution

The fourth proportional to 20,859.54, 28,792.20 and 11,911.92 is: 16,441.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,859.54 : 28,792.20 = 11,911.92 : x
  2. Step 2: Convert to fraction form
    20,859.54/28,792.20 = 11,911.92/x
  3. Step 3: Cross multiply
    20,859.54x = 28,792.20 × 11,911.92
  4. Step 4: Simplify right side
    20,859.54x = 342,970,383.02
  5. Step 5: Solve for x
    x = 342,970,383.02/20,859.54
  6. Step 6: Final answer
    x = 16,441.90

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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.