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Finding the Fourth Proportional to 28,560.80, 39,413.90 and 15,985.55

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Solution

The fourth proportional to 28,560.80, 39,413.90 and 15,985.55 is: 22,060.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,560.80 : 39,413.90 = 15,985.55 : x
  2. Step 2: Convert to fraction form
    28,560.80/39,413.90 = 15,985.55/x
  3. Step 3: Cross multiply
    28,560.80x = 39,413.90 × 15,985.55
  4. Step 4: Simplify right side
    28,560.80x = 630,053,007.64
  5. Step 5: Solve for x
    x = 630,053,007.64/28,560.80
  6. Step 6: Final answer
    x = 22,060.06

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