Final answer:
The appropriate fluid administration dose for the patient is to provide intravenous fluids to restore fluid volume to normal levels and raise blood pressure.
Step-by-step explanation:
Hypovolemic shock, caused by severe fluid loss, is a possible explanation for the patient's symptoms. The low blood pressure, tachycardia, and prolonged capillary refill time indicate inadequate blood flow and tissue perfusion. The appropriate fluid administration dose for this patient would be to provide intravenous fluids to restore fluid volume to normal levels and raise blood pressure. The quantity of fluids administered will depend on the severity of fluid loss and the patient's weight.