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Finding the Fourth Proportional to 18,083.73, 27,129.74 and 6,990.51

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Solution

The fourth proportional to 18,083.73, 27,129.74 and 6,990.51 is: 10,487.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,083.73 : 27,129.74 = 6,990.51 : x
  2. Step 2: Convert to fraction form
    18,083.73/27,129.74 = 6,990.51/x
  3. Step 3: Cross multiply
    18,083.73x = 27,129.74 × 6,990.51
  4. Step 4: Simplify right side
    18,083.73x = 189,650,683.81
  5. Step 5: Solve for x
    x = 189,650,683.81/18,083.73
  6. Step 6: Final answer
    x = 10,487.37

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.