Finding the Fourth Proportional to 20,378,964.24, 28,122,928.74 and 11,211,585.12
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Solution
The fourth proportional to 20,378,964.24, 28,122,928.74 and 11,211,585.12 is: 15,471,964.41
Step by Step Solution
- Step 1: Write the proportion equation
20,378,964.24 : 28,122,928.74 = 11,211,585.12 : x - Step 2: Convert to fraction form
20,378,964.24/28,122,928.74 = 11,211,585.12/x - Step 3: Cross multiply
20,378,964.24x = 28,122,928.74 × 11,211,585.12 - Step 4: Simplify right side
20,378,964.24x = 315,302,609,392,204.31 - Step 5: Solve for x
x = 315,302,609,392,204.31/20,378,964.24 - Step 6: Final answer
x = 15,471,964.41
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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.