Home / 20,643,190.20-30,988,404.90-12,128,324.40

Finding the Fourth Proportional to 20,643,190.20, 30,988,404.90 and 12,128,324.40

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Solution

The fourth proportional to 20,643,190.20, 30,988,404.90 and 12,128,324.40 is: 18,206,363.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643,190.20 : 30,988,404.90 = 12,128,324.40 : x
  2. Step 2: Convert to fraction form
    20,643,190.20/30,988,404.90 = 12,128,324.40/x
  3. Step 3: Cross multiply
    20,643,190.20x = 30,988,404.90 × 12,128,324.40
  4. Step 4: Simplify right side
    20,643,190.20x = 375,837,427,265,749.56
  5. Step 5: Solve for x
    x = 375,837,427,265,749.56/20,643,190.20
  6. Step 6: Final answer
    x = 18,206,363.63

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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.