Finding the Fourth Proportional to 21,010,809.40, 31,497,551.70 and 12,482,092.60
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Solution
The fourth proportional to 21,010,809.40, 31,497,551.70 and 12,482,092.60 is: 18,712,051.95
Step by Step Solution
- Step 1: Write the proportion equation
21,010,809.40 : 31,497,551.70 = 12,482,092.60 : x - Step 2: Convert to fraction form
21,010,809.40/31,497,551.70 = 12,482,092.60/x - Step 3: Cross multiply
21,010,809.40x = 31,497,551.70 × 12,482,092.60 - Step 4: Simplify right side
21,010,809.40x = 393,155,356,992,687.38 - Step 5: Solve for x
x = 393,155,356,992,687.38/21,010,809.40 - Step 6: Final answer
x = 18,712,051.95
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.