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Finding the Fourth Proportional to 8,426.97, 11,628.44 and 8,143.88

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Solution

The fourth proportional to 8,426.97, 11,628.44 and 8,143.88 is: 11,237.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,426.97 : 11,628.44 = 8,143.88 : x
  2. Step 2: Convert to fraction form
    8,426.97/11,628.44 = 8,143.88/x
  3. Step 3: Cross multiply
    8,426.97x = 11,628.44 × 8,143.88
  4. Step 4: Simplify right side
    8,426.97x = 94,700,521.09
  5. Step 5: Solve for x
    x = 94,700,521.09/8,426.97
  6. Step 6: Final answer
    x = 11,237.79

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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.