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Finding the Fourth Proportional to 8,993.79, 12,413.07 and 5,639.54

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Solution

The fourth proportional to 8,993.79, 12,413.07 and 5,639.54 is: 7,783.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,993.79 : 12,413.07 = 5,639.54 : x
  2. Step 2: Convert to fraction form
    8,993.79/12,413.07 = 5,639.54/x
  3. Step 3: Cross multiply
    8,993.79x = 12,413.07 × 5,639.54
  4. Step 4: Simplify right side
    8,993.79x = 70,003,942.72
  5. Step 5: Solve for x
    x = 70,003,942.72/8,993.79
  6. Step 6: Final answer
    x = 7,783.59

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1.5x scale

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.