Finding the Fourth Proportional to 21,394,731.15, 29,529,997.47 and 13,136,772.24
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Solution
The fourth proportional to 21,394,731.15, 29,529,997.47 and 13,136,772.24 is: 18,131,980.64
Step by Step Solution
- Step 1: Write the proportion equation
21,394,731.15 : 29,529,997.47 = 13,136,772.24 : x - Step 2: Convert to fraction form
21,394,731.15/29,529,997.47 = 13,136,772.24/x - Step 3: Cross multiply
21,394,731.15x = 29,529,997.47 × 13,136,772.24 - Step 4: Simplify right side
21,394,731.15x = 387,928,851,011,166.25 - Step 5: Solve for x
x = 387,928,851,011,166.25/21,394,731.15 - Step 6: Final answer
x = 18,131,980.64
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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.