Like Djordje, I have two older brothers too. In my opinion, three brothers shouldn't be forced or shouldn't try to copy the oldest brother, regarding their career.
My brothers and I all went to the same primary school, high school and uni, and all studied engineering... but no one can be like my oldest brother. My other brother is more into business and I am more into sport...
Kids really should be directed to what they're good at and what they love doing, not what their oldest sibling does.