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Finding the Fourth Proportional to 12,906.61, 17,811.84 and 7,243.17

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Solution

The fourth proportional to 12,906.61, 17,811.84 and 7,243.17 is: 9,995.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,906.61 : 17,811.84 = 7,243.17 : x
  2. Step 2: Convert to fraction form
    12,906.61/17,811.84 = 7,243.17/x
  3. Step 3: Cross multiply
    12,906.61x = 17,811.84 × 7,243.17
  4. Step 4: Simplify right side
    12,906.61x = 129,014,185.13
  5. Step 5: Solve for x
    x = 129,014,185.13/12,906.61
  6. Step 6: Final answer
    x = 9,995.98

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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.