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Finding the Fourth Proportional to 13,659,321.60, 20,444,745.60 and 9,678,009.60

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Solution

The fourth proportional to 13,659,321.60, 20,444,745.60 and 9,678,009.60 is: 14,485,671.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659,321.60 : 20,444,745.60 = 9,678,009.60 : x
  2. Step 2: Convert to fraction form
    13,659,321.60/20,444,745.60 = 9,678,009.60/x
  3. Step 3: Cross multiply
    13,659,321.60x = 20,444,745.60 × 9,678,009.60
  4. Step 4: Simplify right side
    13,659,321.60x = 197,864,444,186,357.78
  5. Step 5: Solve for x
    x = 197,864,444,186,357.78/13,659,321.60
  6. Step 6: Final answer
    x = 14,485,671.40

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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.