Finding the Fourth Proportional to 21,278,991.18, 29,365,040.58 and 12,111,633.92
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Solution
The fourth proportional to 21,278,991.18, 29,365,040.58 and 12,111,633.92 is: 16,714,073.45
Step by Step Solution
- Step 1: Write the proportion equation
21,278,991.18 : 29,365,040.58 = 12,111,633.92 : x - Step 2: Convert to fraction form
21,278,991.18/29,365,040.58 = 12,111,633.92/x - Step 3: Cross multiply
21,278,991.18x = 29,365,040.58 × 12,111,633.92 - Step 4: Simplify right side
21,278,991.18x = 355,658,621,550,904.44 - Step 5: Solve for x
x = 355,658,621,550,904.44/21,278,991.18 - Step 6: Final answer
x = 16,714,073.45
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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.