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Finding the Fourth Proportional to 21,993,937.40, 32,990,906.10 and 20,500,945.40

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Solution

The fourth proportional to 21,993,937.40, 32,990,906.10 and 20,500,945.40 is: 30,751,418.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,993,937.40 : 32,990,906.10 = 20,500,945.40 : x
  2. Step 2: Convert to fraction form
    21,993,937.40/32,990,906.10 = 20,500,945.40/x
  3. Step 3: Cross multiply
    21,993,937.40x = 32,990,906.10 × 20,500,945.40
  4. Step 4: Simplify right side
    21,993,937.40x = 676,344,764,652,626.88
  5. Step 5: Solve for x
    x = 676,344,764,652,626.88/21,993,937.40
  6. Step 6: Final answer
    x = 30,751,418.10

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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.