Home / 12,879.27-19,301.76-8,431.29

Finding the Fourth Proportional to 12,879.27, 19,301.76 and 8,431.29

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Solution

The fourth proportional to 12,879.27, 19,301.76 and 8,431.29 is: 12,635.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,879.27 : 19,301.76 = 8,431.29 : x
  2. Step 2: Convert to fraction form
    12,879.27/19,301.76 = 8,431.29/x
  3. Step 3: Cross multiply
    12,879.27x = 19,301.76 × 8,431.29
  4. Step 4: Simplify right side
    12,879.27x = 162,738,736.07
  5. Step 5: Solve for x
    x = 162,738,736.07/12,879.27
  6. Step 6: Final answer
    x = 12,635.71

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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.