Inexplicable base bias
You are trying to set bias current to 4.3V/1k = 4.3mA, which would drop 21.5V across the collector resistor. 

Your transistor is saturating and loading the base resistor divider. 



Edit: 

The circuit as far as the base voltage looks like the below, because the transistor is saturated and has likely &lt; 0.1V Vce. 

The base current flows directly into the emitter resistor with one diode drop since R4 (your load resistor) is already contributing as much current through the transistor collector as it can. 

Simulation with the diode shows the voltage at about 2.5V, which is close to your measurement. 







simulate this circuit &ndash; Schematic created using CircuitLab