Home / 20,189,996.70-30,284,995.05-12,127,839.90

Finding the Fourth Proportional to 20,189,996.70, 30,284,995.05 and 12,127,839.90

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Solution

The fourth proportional to 20,189,996.70, 30,284,995.05 and 12,127,839.90 is: 18,191,759.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,189,996.70 : 30,284,995.05 = 12,127,839.90 : x
  2. Step 2: Convert to fraction form
    20,189,996.70/30,284,995.05 = 12,127,839.90/x
  3. Step 3: Cross multiply
    20,189,996.70x = 30,284,995.05 × 12,127,839.90
  4. Step 4: Simplify right side
    20,189,996.70x = 367,291,571,338,692.50
  5. Step 5: Solve for x
    x = 367,291,571,338,692.50/20,189,996.70
  6. Step 6: Final answer
    x = 18,191,759.85

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1.5x scale

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.