Finding the Fourth Proportional to 20,430,467.40, 28,194,237.39 and 11,263,438.20
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Solution
The fourth proportional to 20,430,467.40, 28,194,237.39 and 11,263,438.20 is: 15,543,650.78
Step by Step Solution
- Step 1: Write the proportion equation
20,430,467.40 : 28,194,237.39 = 11,263,438.20 : x - Step 2: Convert to fraction form
20,430,467.40/28,194,237.39 = 11,263,438.20/x - Step 3: Cross multiply
20,430,467.40x = 28,194,237.39 × 11,263,438.20 - Step 4: Simplify right side
20,430,467.40x = 317,564,050,438,394.31 - Step 5: Solve for x
x = 317,564,050,438,394.31/20,430,467.40 - Step 6: Final answer
x = 15,543,650.78
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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.