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Finding the Fourth Proportional to 8,503,280.40, 12,786,413.40 and 7,117,597.20

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Solution

The fourth proportional to 8,503,280.40, 12,786,413.40 and 7,117,597.20 is: 10,702,756.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,503,280.40 : 12,786,413.40 = 7,117,597.20 : x
  2. Step 2: Convert to fraction form
    8,503,280.40/12,786,413.40 = 7,117,597.20/x
  3. Step 3: Cross multiply
    8,503,280.40x = 12,786,413.40 × 7,117,597.20
  4. Step 4: Simplify right side
    8,503,280.40x = 91,008,540,213,882.48
  5. Step 5: Solve for x
    x = 91,008,540,213,882.48/8,503,280.40
  6. Step 6: Final answer
    x = 10,702,756.58

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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.