Home / 12,491.23-18,736.39-3,131.32

Finding the Fourth Proportional to 12,491.23, 18,736.39 and 3,131.32

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Solution

The fourth proportional to 12,491.23, 18,736.39 and 3,131.32 is: 4,696.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,491.23 : 18,736.39 = 3,131.32 : x
  2. Step 2: Convert to fraction form
    12,491.23/18,736.39 = 3,131.32/x
  3. Step 3: Cross multiply
    12,491.23x = 18,736.39 × 3,131.32
  4. Step 4: Simplify right side
    12,491.23x = 58,669,632.73
  5. Step 5: Solve for x
    x = 58,669,632.73/12,491.23
  6. Step 6: Final answer
    x = 4,696.87

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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.