Home / 21,558.29-29,749.68-11,997.86

Finding the Fourth Proportional to 21,558.29, 29,749.68 and 11,997.86

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Solution

The fourth proportional to 21,558.29, 29,749.68 and 11,997.86 is: 16,556.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,558.29 : 29,749.68 = 11,997.86 : x
  2. Step 2: Convert to fraction form
    21,558.29/29,749.68 = 11,997.86/x
  3. Step 3: Cross multiply
    21,558.29x = 29,749.68 × 11,997.86
  4. Step 4: Simplify right side
    21,558.29x = 356,932,346.94
  5. Step 5: Solve for x
    x = 356,932,346.94/21,558.29
  6. Step 6: Final answer
    x = 16,556.62

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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.