Finding the Fourth Proportional to 20,212,984.80, 30,319,477.20 and 15,430,015.80
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Solution
The fourth proportional to 20,212,984.80, 30,319,477.20 and 15,430,015.80 is: 23,145,023.70
Step by Step Solution
- Step 1: Write the proportion equation
20,212,984.80 : 30,319,477.20 = 15,430,015.80 : x - Step 2: Convert to fraction form
20,212,984.80/30,319,477.20 = 15,430,015.80/x - Step 3: Cross multiply
20,212,984.80x = 30,319,477.20 × 15,430,015.80 - Step 4: Simplify right side
20,212,984.80x = 467,830,012,243,739.75 - Step 5: Solve for x
x = 467,830,012,243,739.75/20,212,984.80 - Step 6: Final answer
x = 23,145,023.70
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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.