Therefore... / Consequently... / As a result...
Formal logical connector introducing a conclusion from what was said. More formal than por eso. Common in academic, legal, and professional writing.
We don't have enough budget; therefore, we need to cut costs.
It's rained all week; consequently, the ground is very wet.
She doesn't meet the requirements; as a result, she can't apply for the position.
There isn't enough evidence, therefore we can't accuse him.
It will rain, therefore we'll take umbrellas.