Home / 31,851.06-43,942.22-20,519.70

Finding the Fourth Proportional to 31,851.06, 43,942.22 and 20,519.70

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Solution

The fourth proportional to 31,851.06, 43,942.22 and 20,519.70 is: 28,309.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,851.06 : 43,942.22 = 20,519.70 : x
  2. Step 2: Convert to fraction form
    31,851.06/43,942.22 = 20,519.70/x
  3. Step 3: Cross multiply
    31,851.06x = 43,942.22 × 20,519.70
  4. Step 4: Simplify right side
    31,851.06x = 901,681,171.73
  5. Step 5: Solve for x
    x = 901,681,171.73/31,851.06
  6. Step 6: Final answer
    x = 28,309.30

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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.