Home / 21,391.92-29,523.60-11,961

Finding the Fourth Proportional to 21,391.92, 29,523.60 and 11,961

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Solution

The fourth proportional to 21,391.92, 29,523.60 and 11,961 is: 16,507.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,391.92 : 29,523.60 = 11,961 : x
  2. Step 2: Convert to fraction form
    21,391.92/29,523.60 = 11,961/x
  3. Step 3: Cross multiply
    21,391.92x = 29,523.60 × 11,961
  4. Step 4: Simplify right side
    21,391.92x = 353,131,779.60
  5. Step 5: Solve for x
    x = 353,131,779.60/21,391.92
  6. Step 6: Final answer
    x = 16,507.72

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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.