Finding the Fourth Proportional to 21,660,975.12, 29,874,926.88 and 18,408,556.20
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Solution
The fourth proportional to 21,660,975.12, 29,874,926.88 and 18,408,556.20 is: 25,389,174.19
Step by Step Solution
- Step 1: Write the proportion equation
21,660,975.12 : 29,874,926.88 = 18,408,556.20 : x - Step 2: Convert to fraction form
21,660,975.12/29,874,926.88 = 18,408,556.20/x - Step 3: Cross multiply
21,660,975.12x = 29,874,926.88 × 18,408,556.20 - Step 4: Simplify right side
21,660,975.12x = 549,954,270,441,370.62 - Step 5: Solve for x
x = 549,954,270,441,370.62/21,660,975.12 - Step 6: Final answer
x = 25,389,174.19
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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.