Home / 20,207,558.70-30,311,338.05-12,145,401.90

Finding the Fourth Proportional to 20,207,558.70, 30,311,338.05 and 12,145,401.90

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Solution

The fourth proportional to 20,207,558.70, 30,311,338.05 and 12,145,401.90 is: 18,218,102.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,207,558.70 : 30,311,338.05 = 12,145,401.90 : x
  2. Step 2: Convert to fraction form
    20,207,558.70/30,311,338.05 = 12,145,401.90/x
  3. Step 3: Cross multiply
    20,207,558.70x = 30,311,338.05 × 12,145,401.90
  4. Step 4: Simplify right side
    20,207,558.70x = 368,143,382,744,012.31
  5. Step 5: Solve for x
    x = 368,143,382,744,012.31/20,207,558.70
  6. Step 6: Final answer
    x = 18,218,102.85

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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.