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Finding the Fourth Proportional to 17,988.72, 26,969.04 and 11,413.68

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Solution

The fourth proportional to 17,988.72, 26,969.04 and 11,413.68 is: 17,111.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,988.72 : 26,969.04 = 11,413.68 : x
  2. Step 2: Convert to fraction form
    17,988.72/26,969.04 = 11,413.68/x
  3. Step 3: Cross multiply
    17,988.72x = 26,969.04 × 11,413.68
  4. Step 4: Simplify right side
    17,988.72x = 307,815,992.47
  5. Step 5: Solve for x
    x = 307,815,992.47/17,988.72
  6. Step 6: Final answer
    x = 17,111.61

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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.