Finding the Fourth Proportional to 20,212,970.80, 30,319,456.20 and 15,430,001.80
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Solution
The fourth proportional to 20,212,970.80, 30,319,456.20 and 15,430,001.80 is: 23,145,002.70
Step by Step Solution
- Step 1: Write the proportion equation
20,212,970.80 : 30,319,456.20 = 15,430,001.80 : x - Step 2: Convert to fraction form
20,212,970.80/30,319,456.20 = 15,430,001.80/x - Step 3: Cross multiply
20,212,970.80x = 30,319,456.20 × 15,430,001.80 - Step 4: Simplify right side
20,212,970.80x = 467,829,263,741,021.19 - Step 5: Solve for x
x = 467,829,263,741,021.19/20,212,970.80 - Step 6: Final answer
x = 23,145,002.70
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.