Finding the Fourth Proportional to 21,145,351.98, 29,186,667.36 and 12,771,391.62
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Solution
The fourth proportional to 21,145,351.98, 29,186,667.36 and 12,771,391.62 is: 17,628,193.62
Step by Step Solution
- Step 1: Write the proportion equation
21,145,351.98 : 29,186,667.36 = 12,771,391.62 : x - Step 2: Convert to fraction form
21,145,351.98/29,186,667.36 = 12,771,391.62/x - Step 3: Cross multiply
21,145,351.98x = 29,186,667.36 × 12,771,391.62 - Step 4: Simplify right side
21,145,351.98x = 372,754,358,937,231.50 - Step 5: Solve for x
x = 372,754,358,937,231.50/21,145,351.98 - Step 6: Final answer
x = 17,628,193.62
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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.