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Finding the Fourth Proportional to 8,776.81, 12,108.60 and 5,413.79

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Solution

The fourth proportional to 8,776.81, 12,108.60 and 5,413.79 is: 7,468.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,776.81 : 12,108.60 = 5,413.79 : x
  2. Step 2: Convert to fraction form
    8,776.81/12,108.60 = 5,413.79/x
  3. Step 3: Cross multiply
    8,776.81x = 12,108.60 × 5,413.79
  4. Step 4: Simplify right side
    8,776.81x = 65,553,364.53
  5. Step 5: Solve for x
    x = 65,553,364.53/8,776.81
  6. Step 6: Final answer
    x = 7,468.93

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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.