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Finding the Fourth Proportional to 18,389,903.60, 27,584,855.40 and 15,520,122.20

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Solution

The fourth proportional to 18,389,903.60, 27,584,855.40 and 15,520,122.20 is: 23,280,183.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,389,903.60 : 27,584,855.40 = 15,520,122.20 : x
  2. Step 2: Convert to fraction form
    18,389,903.60/27,584,855.40 = 15,520,122.20/x
  3. Step 3: Cross multiply
    18,389,903.60x = 27,584,855.40 × 15,520,122.20
  4. Step 4: Simplify right side
    18,389,903.60x = 428,120,326,677,329.81
  5. Step 5: Solve for x
    x = 428,120,326,677,329.81/18,389,903.60
  6. Step 6: Final answer
    x = 23,280,183.30

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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.