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Finding the Fourth Proportional to 20,662,652.80, 30,993,979.20 and 18,430,600.60

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Solution

The fourth proportional to 20,662,652.80, 30,993,979.20 and 18,430,600.60 is: 27,645,900.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,662,652.80 : 30,993,979.20 = 18,430,600.60 : x
  2. Step 2: Convert to fraction form
    20,662,652.80/30,993,979.20 = 18,430,600.60/x
  3. Step 3: Cross multiply
    20,662,652.80x = 30,993,979.20 × 18,430,600.60
  4. Step 4: Simplify right side
    20,662,652.80x = 571,237,651,639,907.50
  5. Step 5: Solve for x
    x = 571,237,651,639,907.50/20,662,652.80
  6. Step 6: Final answer
    x = 27,645,900.90

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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.