Home / 20,792.85-31,179.06-11,906.79

Finding the Fourth Proportional to 20,792.85, 31,179.06 and 11,906.79

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Solution

The fourth proportional to 20,792.85, 31,179.06 and 11,906.79 is: 17,854.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.85 : 31,179.06 = 11,906.79 : x
  2. Step 2: Convert to fraction form
    20,792.85/31,179.06 = 11,906.79/x
  3. Step 3: Cross multiply
    20,792.85x = 31,179.06 × 11,906.79
  4. Step 4: Simplify right side
    20,792.85x = 371,242,519.82
  5. Step 5: Solve for x
    x = 371,242,519.82/20,792.85
  6. Step 6: Final answer
    x = 17,854.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.