Finding the Fourth Proportional to 21,438,364.72, 29,581,612.94 and 12,736,313.68
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Solution
The fourth proportional to 21,438,364.72, 29,581,612.94 and 12,736,313.68 is: 17,574,134.34
Step by Step Solution
- Step 1: Write the proportion equation
21,438,364.72 : 29,581,612.94 = 12,736,313.68 : x - Step 2: Convert to fraction form
21,438,364.72/29,581,612.94 = 12,736,313.68/x - Step 3: Cross multiply
21,438,364.72x = 29,581,612.94 × 12,736,313.68 - Step 4: Simplify right side
21,438,364.72x = 376,760,701,564,187 - Step 5: Solve for x
x = 376,760,701,564,187/21,438,364.72 - Step 6: Final answer
x = 17,574,134.34
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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.