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Finding the Fourth Proportional to 15,517.78, 21,413.84 and 8,444.18

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Solution

The fourth proportional to 15,517.78, 21,413.84 and 8,444.18 is: 11,652.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,517.78 : 21,413.84 = 8,444.18 : x
  2. Step 2: Convert to fraction form
    15,517.78/21,413.84 = 8,444.18/x
  3. Step 3: Cross multiply
    15,517.78x = 21,413.84 × 8,444.18
  4. Step 4: Simplify right side
    15,517.78x = 180,822,330.76
  5. Step 5: Solve for x
    x = 180,822,330.76/15,517.78
  6. Step 6: Final answer
    x = 11,652.59

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