Home / 21,002,651.80-31,503,977.70-12,019,816.60

Finding the Fourth Proportional to 21,002,651.80, 31,503,977.70 and 12,019,816.60

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Solution

The fourth proportional to 21,002,651.80, 31,503,977.70 and 12,019,816.60 is: 18,029,724.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,651.80 : 31,503,977.70 = 12,019,816.60 : x
  2. Step 2: Convert to fraction form
    21,002,651.80/31,503,977.70 = 12,019,816.60/x
  3. Step 3: Cross multiply
    21,002,651.80x = 31,503,977.70 × 12,019,816.60
  4. Step 4: Simplify right side
    21,002,651.80x = 378,672,034,124,489.81
  5. Step 5: Solve for x
    x = 378,672,034,124,489.81/21,002,651.80
  6. Step 6: Final answer
    x = 18,029,724.90

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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.