Finding the Fourth Proportional to 21,216,740.70, 29,286,270.56 and 13,784,571.12
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Solution
The fourth proportional to 21,216,740.70, 29,286,270.56 and 13,784,571.12 is: 19,027,365.47
Step by Step Solution
- Step 1: Write the proportion equation
21,216,740.70 : 29,286,270.56 = 13,784,571.12 : x - Step 2: Convert to fraction form
21,216,740.70/29,286,270.56 = 13,784,571.12/x - Step 3: Cross multiply
21,216,740.70x = 29,286,270.56 × 13,784,571.12 - Step 4: Simplify right side
21,216,740.70x = 403,698,679,373,882.19 - Step 5: Solve for x
x = 403,698,679,373,882.19/21,216,740.70 - Step 6: Final answer
x = 19,027,365.47
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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.