Home / 20,876.45-31,324.97-9,781.22

Finding the Fourth Proportional to 20,876.45, 31,324.97 and 9,781.22

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Solution

The fourth proportional to 20,876.45, 31,324.97 and 9,781.22 is: 14,676.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,876.45 : 31,324.97 = 9,781.22 : x
  2. Step 2: Convert to fraction form
    20,876.45/31,324.97 = 9,781.22/x
  3. Step 3: Cross multiply
    20,876.45x = 31,324.97 × 9,781.22
  4. Step 4: Simplify right side
    20,876.45x = 306,396,423.06
  5. Step 5: Solve for x
    x = 306,396,423.06/20,876.45
  6. Step 6: Final answer
    x = 14,676.65

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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.