Finding the Fourth Proportional to 20,511,538.93, 28,314,639.36 and 12,780,400.98
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Solution
The fourth proportional to 20,511,538.93, 28,314,639.36 and 12,780,400.98 is: 17,642,383.92
Step by Step Solution
- Step 1: Write the proportion equation
20,511,538.93 : 28,314,639.36 = 12,780,400.98 : x - Step 2: Convert to fraction form
20,511,538.93/28,314,639.36 = 12,780,400.98/x - Step 3: Cross multiply
20,511,538.93x = 28,314,639.36 × 12,780,400.98 - Step 4: Simplify right side
20,511,538.93x = 361,872,444,624,890.56 - Step 5: Solve for x
x = 361,872,444,624,890.56/20,511,538.93 - Step 6: Final answer
x = 17,642,383.92
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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.