Finding the Fourth Proportional to 12,985,211.13, 17,918,043.42 and 7,183,207.05
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Solution
The fourth proportional to 12,985,211.13, 17,918,043.42 and 7,183,207.05 is: 9,911,969.43
Step by Step Solution
- Step 1: Write the proportion equation
12,985,211.13 : 17,918,043.42 = 7,183,207.05 : x - Step 2: Convert to fraction form
12,985,211.13/17,918,043.42 = 7,183,207.05/x - Step 3: Cross multiply
12,985,211.13x = 17,918,043.42 × 7,183,207.05 - Step 4: Simplify right side
12,985,211.13x = 128,709,015,816,750.12 - Step 5: Solve for x
x = 128,709,015,816,750.12/12,985,211.13 - Step 6: Final answer
x = 9,911,969.43
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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.