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Finding the Fourth Proportional to 8,413.80, 12,620.70 and 7,506.60

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Solution

The fourth proportional to 8,413.80, 12,620.70 and 7,506.60 is: 11,259.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,413.80 : 12,620.70 = 7,506.60 : x
  2. Step 2: Convert to fraction form
    8,413.80/12,620.70 = 7,506.60/x
  3. Step 3: Cross multiply
    8,413.80x = 12,620.70 × 7,506.60
  4. Step 4: Simplify right side
    8,413.80x = 94,738,546.62
  5. Step 5: Solve for x
    x = 94,738,546.62/8,413.80
  6. Step 6: Final answer
    x = 11,259.90

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.