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Finding the Fourth Proportional to 12,662.13, 17,479.20 and 11,865.18

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Solution

The fourth proportional to 12,662.13, 17,479.20 and 11,865.18 is: 16,379.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,662.13 : 17,479.20 = 11,865.18 : x
  2. Step 2: Convert to fraction form
    12,662.13/17,479.20 = 11,865.18/x
  3. Step 3: Cross multiply
    12,662.13x = 17,479.20 × 11,865.18
  4. Step 4: Simplify right side
    12,662.13x = 207,393,854.26
  5. Step 5: Solve for x
    x = 207,393,854.26/12,662.13
  6. Step 6: Final answer
    x = 16,379.07

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.