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Finding the Fourth Proportional to 13,890,308.60, 20,807,469.30 and 9,355,345.40

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Solution

The fourth proportional to 13,890,308.60, 20,807,469.30 and 9,355,345.40 is: 14,014,163.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890,308.60 : 20,807,469.30 = 9,355,345.40 : x
  2. Step 2: Convert to fraction form
    13,890,308.60/20,807,469.30 = 9,355,345.40/x
  3. Step 3: Cross multiply
    13,890,308.60x = 20,807,469.30 × 9,355,345.40
  4. Step 4: Simplify right side
    13,890,308.60x = 194,661,062,201,396.25
  5. Step 5: Solve for x
    x = 194,661,062,201,396.25/13,890,308.60
  6. Step 6: Final answer
    x = 14,014,163.96

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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.