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Finding the Fourth Proportional to 11,518.20, 17,269.20 and 5,281.20

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Solution

The fourth proportional to 11,518.20, 17,269.20 and 5,281.20 is: 7,918.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,518.20 : 17,269.20 = 5,281.20 : x
  2. Step 2: Convert to fraction form
    11,518.20/17,269.20 = 5,281.20/x
  3. Step 3: Cross multiply
    11,518.20x = 17,269.20 × 5,281.20
  4. Step 4: Simplify right side
    11,518.20x = 91,202,099.04
  5. Step 5: Solve for x
    x = 91,202,099.04/11,518.20
  6. Step 6: Final answer
    x = 7,918.09

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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.