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Finding the Fourth Proportional to 13,319.88, 18,388.80 and 8,016

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Solution

The fourth proportional to 13,319.88, 18,388.80 and 8,016 is: 11,066.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,319.88 : 18,388.80 = 8,016 : x
  2. Step 2: Convert to fraction form
    13,319.88/18,388.80 = 8,016/x
  3. Step 3: Cross multiply
    13,319.88x = 18,388.80 × 8,016
  4. Step 4: Simplify right side
    13,319.88x = 147,404,620.80
  5. Step 5: Solve for x
    x = 147,404,620.80/13,319.88
  6. Step 6: Final answer
    x = 11,066.51

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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.