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Finding the Fourth Proportional to 8,284.40, 12,390.60 and 7,413.20

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Solution

The fourth proportional to 8,284.40, 12,390.60 and 7,413.20 is: 11,087.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,284.40 : 12,390.60 = 7,413.20 : x
  2. Step 2: Convert to fraction form
    8,284.40/12,390.60 = 7,413.20/x
  3. Step 3: Cross multiply
    8,284.40x = 12,390.60 × 7,413.20
  4. Step 4: Simplify right side
    8,284.40x = 91,853,995.92
  5. Step 5: Solve for x
    x = 91,853,995.92/8,284.40
  6. Step 6: Final answer
    x = 11,087.59

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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.