Home / 21,147.69-29,183.82-11,718.09

Finding the Fourth Proportional to 21,147.69, 29,183.82 and 11,718.09

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Solution

The fourth proportional to 21,147.69, 29,183.82 and 11,718.09 is: 16,170.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.69 : 29,183.82 = 11,718.09 : x
  2. Step 2: Convert to fraction form
    21,147.69/29,183.82 = 11,718.09/x
  3. Step 3: Cross multiply
    21,147.69x = 29,183.82 × 11,718.09
  4. Step 4: Simplify right side
    21,147.69x = 341,978,629.30
  5. Step 5: Solve for x
    x = 341,978,629.30/21,147.69
  6. Step 6: Final answer
    x = 16,170.97

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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.