Finding the Fourth Proportional to 21,456,085.97, 29,617,975.19 and 13,199,493.94
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Solution
The fourth proportional to 21,456,085.97, 29,617,975.19 and 13,199,493.94 is: 18,220,577.81
Step by Step Solution
- Step 1: Write the proportion equation
21,456,085.97 : 29,617,975.19 = 13,199,493.94 : x - Step 2: Convert to fraction form
21,456,085.97/29,617,975.19 = 13,199,493.94/x - Step 3: Cross multiply
21,456,085.97x = 29,617,975.19 × 13,199,493.94 - Step 4: Simplify right side
21,456,085.97x = 390,942,283,994,429.12 - Step 5: Solve for x
x = 390,942,283,994,429.12/21,456,085.97 - Step 6: Final answer
x = 18,220,577.81
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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.