It looks like the iPad is taking a bite out of more than the Windows PC market.

Apple’s quarterly results, released a short time ago, show sales of the company’s tablet climbing again in the fourth quarter, to a record 22.9 million units, up from 15.4 million a year ago.  The results include numbers from the launch of the iPad mini in November.

For context, the figure for the iPad in the recent quarter was the equivalent of 25 percent of shipments in the traditional PC market in the same period.

The ongoing rise of the iPad is more evidence that many people are opting for the Apple tablet rather than low-end Windows notebooks. It’s particularly notable that the new record came despite the launch of Microsoft’s Windows 8, with its new tablet-friendly touch-oriented interface, in October.

At the same time, Apple reported that sales of Macs fell during the quarter, dropping to 4.1 million units, compared with 5.2 million units in the same quarter a year earlier.

Meanwhile, unit sales of the iPhone hit a record, reaching 47.8 million in the quarter, up from 37 million a year ago.

Apple overall beat missed analysts’ expectations with revenue of $54.5 billion for the quarter (compared to the consensus expectation of $54.7 billion among analysts polled by Thomson Reuters), and beat expectations with earnings of $13.81 per share (consensus was $13.47 per share).

Post corrected above to reflect revenue miss. Thanks to Joe in the comments below.

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