Given: The ratio of two numbers be 19 : 26. New ratio will be 3 : 4. Concept Used: Ratio concept used. Calculation: Let the two numbers be 19x and 26x. If 2 added to 19x = 19x + 2. According to the question, (19x+2)/26x=3/4 ⇒4(19x+2)=3×26x ⇒76x+8=78x ⇒2x=8 ⇒ x = 4 So, Big number = 26 × 4 = 104 ∴The big number is 104.