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Finding the Fourth Proportional to 18,645.51, 27,959.43 and 6,790.89

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Solution

The fourth proportional to 18,645.51, 27,959.43 and 6,790.89 is: 10,183.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,645.51 : 27,959.43 = 6,790.89 : x
  2. Step 2: Convert to fraction form
    18,645.51/27,959.43 = 6,790.89/x
  3. Step 3: Cross multiply
    18,645.51x = 27,959.43 × 6,790.89
  4. Step 4: Simplify right side
    18,645.51x = 189,869,413.59
  5. Step 5: Solve for x
    x = 189,869,413.59/18,645.51
  6. Step 6: Final answer
    x = 10,183.12

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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.