Home / 20,792.35-31,178.31-11,906.29

Finding the Fourth Proportional to 20,792.35, 31,178.31 and 11,906.29

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Solution

The fourth proportional to 20,792.35, 31,178.31 and 11,906.29 is: 17,853.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.35 : 31,178.31 = 11,906.29 : x
  2. Step 2: Convert to fraction form
    20,792.35/31,178.31 = 11,906.29/x
  3. Step 3: Cross multiply
    20,792.35x = 31,178.31 × 11,906.29
  4. Step 4: Simplify right side
    20,792.35x = 371,218,000.57
  5. Step 5: Solve for x
    x = 371,218,000.57/20,792.35
  6. Step 6: Final answer
    x = 17,853.59

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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.