Home / 21,002,649.80-31,503,974.70-12,019,814.60

Finding the Fourth Proportional to 21,002,649.80, 31,503,974.70 and 12,019,814.60

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Solution

The fourth proportional to 21,002,649.80, 31,503,974.70 and 12,019,814.60 is: 18,029,721.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,002,649.80 : 31,503,974.70 = 12,019,814.60 : x
  2. Step 2: Convert to fraction form
    21,002,649.80/31,503,974.70 = 12,019,814.60/x
  3. Step 3: Cross multiply
    21,002,649.80x = 31,503,974.70 × 12,019,814.60
  4. Step 4: Simplify right side
    21,002,649.80x = 378,671,935,057,090.62
  5. Step 5: Solve for x
    x = 378,671,935,057,090.62/21,002,649.80
  6. Step 6: Final answer
    x = 18,029,721.90

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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.