Home / 20,694.49-31,033.23-8,212.79

Finding the Fourth Proportional to 20,694.49, 31,033.23 and 8,212.79

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Solution

The fourth proportional to 20,694.49, 31,033.23 and 8,212.79 is: 12,315.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,694.49 : 31,033.23 = 8,212.79 : x
  2. Step 2: Convert to fraction form
    20,694.49/31,033.23 = 8,212.79/x
  3. Step 3: Cross multiply
    20,694.49x = 31,033.23 × 8,212.79
  4. Step 4: Simplify right side
    20,694.49x = 254,869,447.80
  5. Step 5: Solve for x
    x = 254,869,447.80/20,694.49
  6. Step 6: Final answer
    x = 12,315.81

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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.