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Finding the Fourth Proportional to 11,163.16, 15,404 and 6,448.96

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Solution

The fourth proportional to 11,163.16, 15,404 and 6,448.96 is: 8,898.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,163.16 : 15,404 = 6,448.96 : x
  2. Step 2: Convert to fraction form
    11,163.16/15,404 = 6,448.96/x
  3. Step 3: Cross multiply
    11,163.16x = 15,404 × 6,448.96
  4. Step 4: Simplify right side
    11,163.16x = 99,339,779.84
  5. Step 5: Solve for x
    x = 99,339,779.84/11,163.16
  6. Step 6: Final answer
    x = 8,898.89

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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.