Finding the Fourth Proportional to 21,409,680.40, 29,531,919.56 and 12,701,688.08
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Solution
The fourth proportional to 21,409,680.40, 29,531,919.56 and 12,701,688.08 is: 17,520,356.38
Step by Step Solution
- Step 1: Write the proportion equation
21,409,680.40 : 29,531,919.56 = 12,701,688.08 : x - Step 2: Convert to fraction form
21,409,680.40/29,531,919.56 = 12,701,688.08/x - Step 3: Cross multiply
21,409,680.40x = 29,531,919.56 × 12,701,688.08 - Step 4: Simplify right side
21,409,680.40x = 375,105,230,654,770.81 - Step 5: Solve for x
x = 375,105,230,654,770.81/21,409,680.40 - Step 6: Final answer
x = 17,520,356.38
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.