Finding the Fourth Proportional to 28,163,119.21, 38,858,442.58 and 15,939,976.21
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Solution
The fourth proportional to 28,163,119.21, 38,858,442.58 and 15,939,976.21 is: 21,993,396.60
Step by Step Solution
- Step 1: Write the proportion equation
28,163,119.21 : 38,858,442.58 = 15,939,976.21 : x - Step 2: Convert to fraction form
28,163,119.21/38,858,442.58 = 15,939,976.21/x - Step 3: Cross multiply
28,163,119.21x = 38,858,442.58 × 15,939,976.21 - Step 4: Simplify right side
28,163,119.21x = 619,402,650,282,851 - Step 5: Solve for x
x = 619,402,650,282,851/28,163,119.21 - Step 6: Final answer
x = 21,993,396.60
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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.