Finding the Fourth Proportional to 20,992,989.84, 31,585,537.80 and 12,479,698.68
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Solution
The fourth proportional to 20,992,989.84, 31,585,537.80 and 12,479,698.68 is: 18,776,648.65
Step by Step Solution
- Step 1: Write the proportion equation
20,992,989.84 : 31,585,537.80 = 12,479,698.68 : x - Step 2: Convert to fraction form
20,992,989.84/31,585,537.80 = 12,479,698.68/x - Step 3: Cross multiply
20,992,989.84x = 31,585,537.80 × 12,479,698.68 - Step 4: Simplify right side
20,992,989.84x = 394,177,994,389,750.12 - Step 5: Solve for x
x = 394,177,994,389,750.12/20,992,989.84 - Step 6: Final answer
x = 18,776,648.65
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.