Finding the Fourth Proportional to 20,824,129.72, 28,736,938.74 and 11,531,515.60
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Solution
The fourth proportional to 20,824,129.72, 28,736,938.74 and 11,531,515.60 is: 15,913,292.02
Step by Step Solution
- Step 1: Write the proportion equation
20,824,129.72 : 28,736,938.74 = 11,531,515.60 : x - Step 2: Convert to fraction form
20,824,129.72/28,736,938.74 = 11,531,515.60/x - Step 3: Cross multiply
20,824,129.72x = 28,736,938.74 × 11,531,515.60 - Step 4: Simplify right side
20,824,129.72x = 331,380,457,376,554.31 - Step 5: Solve for x
x = 331,380,457,376,554.31/20,824,129.72 - Step 6: Final answer
x = 15,913,292.02
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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.