Finding the Fourth Proportional to 20,865,206.20, 31,297,809.30 and 13,212,455.80
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Solution
The fourth proportional to 20,865,206.20, 31,297,809.30 and 13,212,455.80 is: 19,818,683.70
Step by Step Solution
- Step 1: Write the proportion equation
20,865,206.20 : 31,297,809.30 = 13,212,455.80 : x - Step 2: Convert to fraction form
20,865,206.20/31,297,809.30 = 13,212,455.80/x - Step 3: Cross multiply
20,865,206.20x = 31,297,809.30 × 13,212,455.80 - Step 4: Simplify right side
20,865,206.20x = 413,520,922,013,079 - Step 5: Solve for x
x = 413,520,922,013,079/20,865,206.20 - Step 6: Final answer
x = 19,818,683.70
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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.