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Finding the Fourth Proportional to 9,039.16, 12,469.26 and 5,311

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Solution

The fourth proportional to 9,039.16, 12,469.26 and 5,311 is: 7,326.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,039.16 : 12,469.26 = 5,311 : x
  2. Step 2: Convert to fraction form
    9,039.16/12,469.26 = 5,311/x
  3. Step 3: Cross multiply
    9,039.16x = 12,469.26 × 5,311
  4. Step 4: Simplify right side
    9,039.16x = 66,224,239.86
  5. Step 5: Solve for x
    x = 66,224,239.86/9,039.16
  6. Step 6: Final answer
    x = 7,326.37

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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.