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Finding the Fourth Proportional to 11,761.53, 17,629.99 and 8,636.89

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Solution

The fourth proportional to 11,761.53, 17,629.99 and 8,636.89 is: 12,946.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,761.53 : 17,629.99 = 8,636.89 : x
  2. Step 2: Convert to fraction form
    11,761.53/17,629.99 = 8,636.89/x
  3. Step 3: Cross multiply
    11,761.53x = 17,629.99 × 8,636.89
  4. Step 4: Simplify right side
    11,761.53x = 152,268,284.33
  5. Step 5: Solve for x
    x = 152,268,284.33/11,761.53
  6. Step 6: Final answer
    x = 12,946.30

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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.