Finding the Fourth Proportional to 15,678,678.24, 21,637,183.32 and 8,709,884.94
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Solution
The fourth proportional to 15,678,678.24, 21,637,183.32 and 8,709,884.94 is: 12,019,978.61
Step by Step Solution
- Step 1: Write the proportion equation
15,678,678.24 : 21,637,183.32 = 8,709,884.94 : x - Step 2: Convert to fraction form
15,678,678.24/21,637,183.32 = 8,709,884.94/x - Step 3: Cross multiply
15,678,678.24x = 21,637,183.32 × 8,709,884.94 - Step 4: Simplify right side
15,678,678.24x = 188,457,377,142,887.19 - Step 5: Solve for x
x = 188,457,377,142,887.19/15,678,678.24 - Step 6: Final answer
x = 12,019,978.61
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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.