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Finding the Fourth Proportional to 19,406.94, 28,978.85 and 15,413.37

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Solution

The fourth proportional to 19,406.94, 28,978.85 and 15,413.37 is: 23,015.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,406.94 : 28,978.85 = 15,413.37 : x
  2. Step 2: Convert to fraction form
    19,406.94/28,978.85 = 15,413.37/x
  3. Step 3: Cross multiply
    19,406.94x = 28,978.85 × 15,413.37
  4. Step 4: Simplify right side
    19,406.94x = 446,661,660.16
  5. Step 5: Solve for x
    x = 446,661,660.16/19,406.94
  6. Step 6: Final answer
    x = 23,015.56

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.