Output voltage using Bode plot
I’m assuming you meant that you use a 10k ohm load and want to know the Vout when input frequency is 10khz. Assuming this is the gain of the circuit plotted on the y-axis. You would look at the bode plot and pin point the 10khz frequency point on horizontal axis. Draw a vertical line at this point. Then find on the curve where This vertical line intersects the curve. At this point Vout=Vin*gain.