Porsche on Tuesday reported revenues up 18% to 3.89 billion euros ($US4.6 billion) in the nine months to the end of April and forecast a rise in profit for the full year, Reuters reported. Publishing nine-month figures for the first time, the world's most profitable carmaker said, according to the news agency, that unit sales in the first three quarters of its business year rose 13% thanks to the new Cayenne SUV, although sales of the 911 and Boxster sports cars slipped 9%.