Home / 20,731.20-31,062.60-11,950.80

Finding the Fourth Proportional to 20,731.20, 31,062.60 and 11,950.80

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Solution

The fourth proportional to 20,731.20, 31,062.60 and 11,950.80 is: 17,906.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,731.20 : 31,062.60 = 11,950.80 : x
  2. Step 2: Convert to fraction form
    20,731.20/31,062.60 = 11,950.80/x
  3. Step 3: Cross multiply
    20,731.20x = 31,062.60 × 11,950.80
  4. Step 4: Simplify right side
    20,731.20x = 371,222,920.08
  5. Step 5: Solve for x
    x = 371,222,920.08/20,731.20
  6. Step 6: Final answer
    x = 17,906.48

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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.