Consider the given proportion,
[tex] \frac{42}{15}=\frac{p}{10} [/tex]
Cross multiplying in the above equation, we get
[tex] 42 \times 10 = p \times 15 [/tex]
Dividing both sides of the above equation by 15, we get
[tex] \frac{42 \times 10}{15} = p [/tex]
[tex] p = 14 \times 2 [/tex]
p = 28
So, the value of 'p' in the given proportion is '28'.
