Finding the Fourth Proportional to 20,405,539.77, 28,160,917.43 and 11,238,180.09
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Solution
The fourth proportional to 20,405,539.77, 28,160,917.43 and 11,238,180.09 is: 15,509,389.37
Step by Step Solution
- Step 1: Write the proportion equation
20,405,539.77 : 28,160,917.43 = 11,238,180.09 : x - Step 2: Convert to fraction form
20,405,539.77/28,160,917.43 = 11,238,180.09/x - Step 3: Cross multiply
20,405,539.77x = 28,160,917.43 × 11,238,180.09 - Step 4: Simplify right side
20,405,539.77x = 316,477,461,521,769.06 - Step 5: Solve for x
x = 316,477,461,521,769.06/20,405,539.77 - Step 6: Final answer
x = 15,509,389.37
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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.