Finding the Fourth Proportional to 20,989,059.84, 28,972,149.12 and 12,290,028.48
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Solution
The fourth proportional to 20,989,059.84, 28,972,149.12 and 12,290,028.48 is: 16,964,482.47
Step by Step Solution
- Step 1: Write the proportion equation
20,989,059.84 : 28,972,149.12 = 12,290,028.48 : x - Step 2: Convert to fraction form
20,989,059.84/28,972,149.12 = 12,290,028.48/x - Step 3: Cross multiply
20,989,059.84x = 28,972,149.12 × 12,290,028.48 - Step 4: Simplify right side
20,989,059.84x = 356,068,537,811,606.94 - Step 5: Solve for x
x = 356,068,537,811,606.94/20,989,059.84 - Step 6: Final answer
x = 16,964,482.47
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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.