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Finding the Fourth Proportional to 28,413.44, 39,207.92 and 15,664.44

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Solution

The fourth proportional to 28,413.44, 39,207.92 and 15,664.44 is: 21,615.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,413.44 : 39,207.92 = 15,664.44 : x
  2. Step 2: Convert to fraction form
    28,413.44/39,207.92 = 15,664.44/x
  3. Step 3: Cross multiply
    28,413.44x = 39,207.92 × 15,664.44
  4. Step 4: Simplify right side
    28,413.44x = 614,170,110.36
  5. Step 5: Solve for x
    x = 614,170,110.36/28,413.44
  6. Step 6: Final answer
    x = 21,615.48

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.