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Finding the Fourth Proportional to 18,702,944.40, 28,007,177.40 and 12,278,413.20

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Solution

The fourth proportional to 18,702,944.40, 28,007,177.40 and 12,278,413.20 is: 18,386,607.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,702,944.40 : 28,007,177.40 = 12,278,413.20 : x
  2. Step 2: Convert to fraction form
    18,702,944.40/28,007,177.40 = 12,278,413.20/x
  3. Step 3: Cross multiply
    18,702,944.40x = 28,007,177.40 × 12,278,413.20
  4. Step 4: Simplify right side
    18,702,944.40x = 343,883,696,682,901.62
  5. Step 5: Solve for x
    x = 343,883,696,682,901.62/18,702,944.40
  6. Step 6: Final answer
    x = 18,386,607.44

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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.