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Finding the Fourth Proportional to 12,398.47, 17,105.41 and 8,151.81

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Solution

The fourth proportional to 12,398.47, 17,105.41 and 8,151.81 is: 11,246.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,398.47 : 17,105.41 = 8,151.81 : x
  2. Step 2: Convert to fraction form
    12,398.47/17,105.41 = 8,151.81/x
  3. Step 3: Cross multiply
    12,398.47x = 17,105.41 × 8,151.81
  4. Step 4: Simplify right side
    12,398.47x = 139,440,052.29
  5. Step 5: Solve for x
    x = 139,440,052.29/12,398.47
  6. Step 6: Final answer
    x = 11,246.55

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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.