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Finding the Fourth Proportional to 18,806,413.60, 28,209,620.40 and 17,672,672.80

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Solution

The fourth proportional to 18,806,413.60, 28,209,620.40 and 17,672,672.80 is: 26,509,009.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,806,413.60 : 28,209,620.40 = 17,672,672.80 : x
  2. Step 2: Convert to fraction form
    18,806,413.60/28,209,620.40 = 17,672,672.80/x
  3. Step 3: Cross multiply
    18,806,413.60x = 28,209,620.40 × 17,672,672.80
  4. Step 4: Simplify right side
    18,806,413.60x = 498,539,391,141,405.12
  5. Step 5: Solve for x
    x = 498,539,391,141,405.12/18,806,413.60
  6. Step 6: Final answer
    x = 26,509,009.20

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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.