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Finding the Fourth Proportional to 11,615.35, 17,419.90 and 5,039.99

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Solution

The fourth proportional to 11,615.35, 17,419.90 and 5,039.99 is: 7,558.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,615.35 : 17,419.90 = 5,039.99 : x
  2. Step 2: Convert to fraction form
    11,615.35/17,419.90 = 5,039.99/x
  3. Step 3: Cross multiply
    11,615.35x = 17,419.90 × 5,039.99
  4. Step 4: Simplify right side
    11,615.35x = 87,796,121.80
  5. Step 5: Solve for x
    x = 87,796,121.80/11,615.35
  6. Step 6: Final answer
    x = 7,558.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.