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Finding the Fourth Proportional to 11,772, 17,664.48 and 5,616

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Solution

The fourth proportional to 11,772, 17,664.48 and 5,616 is: 8,427.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,772 : 17,664.48 = 5,616 : x
  2. Step 2: Convert to fraction form
    11,772/17,664.48 = 5,616/x
  3. Step 3: Cross multiply
    11,772x = 17,664.48 × 5,616
  4. Step 4: Simplify right side
    11,772x = 99,203,719.68
  5. Step 5: Solve for x
    x = 99,203,719.68/11,772
  6. Step 6: Final answer
    x = 8,427.09

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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.