How do you solve $\frac{21}{36} = \frac{4.8}{d}$ $\frac { 21} { 36} = \frac { 4.8} { d }$ ?

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How do you solve $\frac{21}{36} = \frac{4.8}{d}$ $\frac { 21} { 36} = \frac { 4.8} { d }$ ?

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Answer 1 · 2017-09-23T15:19:12

$d = 8.228571$ $d = 8.228571$

Explanation:

Step One: Cross multiply

$21 \cdot d = 4.8 \cdot 36$ $21 * color(red)(d) = 4.8 * color(red)(36)$

that gives us

$21 d = 172.8$ $color(green)(21d) = color(green)(172.8)$

Step two: divide both sides by 21

$\frac{21 d}{21} = \frac{172.8}{21}$ $(21d)/color(blue)(21) = 172.8/color(blue)(21)$

this gives us the answer ...

$d = 8.228571$ $color(darkgreen)(d = 8.228571$

Answer 2 · 2017-09-23T15:20:42

$8.22$ $8.22$

Explanation:

$\frac{21}{36} = \frac{4.8}{d}$ $21/36 = 4.8/d$
Cross multiply
$21 d = 4.8 \cdot 36$ $21d = 4.8*36$
$21 d = 172.8$ $21d = 172.8$
Divide both sides by $21$ $21$
$\frac{21 d}{21} = \frac{172.8}{21}$ $(21d)/21= 172.8/21$
$= 8.22$ $=8.22$

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How do you solve $\frac{21}{36} = \frac{4.8}{d}$ $\frac { 21} { 36} = \frac { 4.8} { d }$ ?

2 Answers

Explanation:

Explanation:

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