Home / 31,851.37-43,942.65-20,519.98

Finding the Fourth Proportional to 31,851.37, 43,942.65 and 20,519.98

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Solution

The fourth proportional to 31,851.37, 43,942.65 and 20,519.98 is: 28,309.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,851.37 : 43,942.65 = 20,519.98 : x
  2. Step 2: Convert to fraction form
    31,851.37/43,942.65 = 20,519.98/x
  3. Step 3: Cross multiply
    31,851.37x = 43,942.65 × 20,519.98
  4. Step 4: Simplify right side
    31,851.37x = 901,702,299.15
  5. Step 5: Solve for x
    x = 901,702,299.15/31,851.37
  6. Step 6: Final answer
    x = 28,309.69

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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.