Finding the Fourth Proportional to 12,998,858.13, 17,938,965.26 and 7,197,639.71
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Solution
The fourth proportional to 12,998,858.13, 17,938,965.26 and 7,197,639.71 is: 9,933,042.37
Step by Step Solution
- Step 1: Write the proportion equation
12,998,858.13 : 17,938,965.26 = 7,197,639.71 : x - Step 2: Convert to fraction form
12,998,858.13/17,938,965.26 = 7,197,639.71/x - Step 3: Cross multiply
12,998,858.13x = 17,938,965.26 × 7,197,639.71 - Step 4: Simplify right side
12,998,858.13x = 129,118,208,586,003.44 - Step 5: Solve for x
x = 129,118,208,586,003.44/12,998,858.13 - Step 6: Final answer
x = 9,933,042.37
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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.