Home / 20,800,557.98-31,140,125.85-12,138,113.42

Finding the Fourth Proportional to 20,800,557.98, 31,140,125.85 and 12,138,113.42

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Solution

The fourth proportional to 20,800,557.98, 31,140,125.85 and 12,138,113.42 is: 18,171,742.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800,557.98 : 31,140,125.85 = 12,138,113.42 : x
  2. Step 2: Convert to fraction form
    20,800,557.98/31,140,125.85 = 12,138,113.42/x
  3. Step 3: Cross multiply
    20,800,557.98x = 31,140,125.85 × 12,138,113.42
  4. Step 4: Simplify right side
    20,800,557.98x = 377,982,379,540,431.44
  5. Step 5: Solve for x
    x = 377,982,379,540,431.44/20,800,557.98
  6. Step 6: Final answer
    x = 18,171,742.31

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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.