Finding the Fourth Proportional to 19,991,986.40, 29,989,101.18 and 5,613,933.06
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Solution
The fourth proportional to 19,991,986.40, 29,989,101.18 and 5,613,933.06 is: 8,421,214.54
Step by Step Solution
- Step 1: Write the proportion equation
19,991,986.40 : 29,989,101.18 = 5,613,933.06 : x - Step 2: Convert to fraction form
19,991,986.40/29,989,101.18 = 5,613,933.06/x - Step 3: Cross multiply
19,991,986.40x = 29,989,101.18 × 5,613,933.06 - Step 4: Simplify right side
19,991,986.40x = 168,356,806,554,087 - Step 5: Solve for x
x = 168,356,806,554,087/19,991,986.40 - Step 6: Final answer
x = 8,421,214.54
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.