\"\"

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The proportion is \"\".

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Apply cross product property: If \"\", then \"\".

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\"\"            (Cross products)

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\"\"      (Apply distributive property: \"\")

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\"\"             (Multiply: \"\")

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\"\"       (Apply distributive property: \"\")

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\"\"                 (Multiply: \"\")\"\"

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Apply subtraction property of equality: Subtract 45 from each side.

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\"\"

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\"\"                 (Apply additive inverse property: \"\")

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\"\"                       (Subtract: \"\")\"\"

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\"\"  (Subtract 27b from each side)

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Apply commutative property of addition: a + b = b + a.

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\"\"

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\"\"                    (Apply additive inverse property: \"\")

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\"\"                              (Subtract: \"\")\"\"

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Apply division property of equality: Divide each side by 18.

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\"\"

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\"\"                                (Cancel common terms)

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\"\"                                     (Divide: \"\")\"\"

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The value of \"\".