Finding the Fourth Proportional to 20,418,313.68, 28,178,638.56 and 11,250,956.70
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Solution
The fourth proportional to 20,418,313.68, 28,178,638.56 and 11,250,956.70 is: 15,527,072.77
Step by Step Solution
- Step 1: Write the proportion equation
20,418,313.68 : 28,178,638.56 = 11,250,956.70 : x - Step 2: Convert to fraction form
20,418,313.68/28,178,638.56 = 11,250,956.70/x - Step 3: Cross multiply
20,418,313.68x = 28,178,638.56 × 11,250,956.70 - Step 4: Simplify right side
20,418,313.68x = 317,036,642,303,510.31 - Step 5: Solve for x
x = 317,036,642,303,510.31/20,418,313.68 - Step 6: Final answer
x = 15,527,072.77
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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.