Finding the Fourth Proportional to 15,315,771.30, 21,135,768.79 and 8,346,450.80
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Solution
The fourth proportional to 15,315,771.30, 21,135,768.79 and 8,346,450.80 is: 11,518,104.51
Step by Step Solution
- Step 1: Write the proportion equation
15,315,771.30 : 21,135,768.79 = 8,346,450.80 : x - Step 2: Convert to fraction form
15,315,771.30/21,135,768.79 = 8,346,450.80/x - Step 3: Cross multiply
15,315,771.30x = 21,135,768.79 × 8,346,450.80 - Step 4: Simplify right side
15,315,771.30x = 176,408,654,397,003.66 - Step 5: Solve for x
x = 176,408,654,397,003.66/15,315,771.30 - Step 6: Final answer
x = 11,518,104.51
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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.