Finding the Fourth Proportional to 21,181,913.19, 29,139,312.42 and 18,556,594.65
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Solution
The fourth proportional to 21,181,913.19, 29,139,312.42 and 18,556,594.65 is: 25,527,741.72
Step by Step Solution
- Step 1: Write the proportion equation
21,181,913.19 : 29,139,312.42 = 18,556,594.65 : x - Step 2: Convert to fraction form
21,181,913.19/29,139,312.42 = 18,556,594.65/x - Step 3: Cross multiply
21,181,913.19x = 29,139,312.42 × 18,556,594.65 - Step 4: Simplify right side
21,181,913.19x = 540,726,408,957,650.56 - Step 5: Solve for x
x = 540,726,408,957,650.56/21,181,913.19 - Step 6: Final answer
x = 25,527,741.72
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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.