Finding the Fourth Proportional to 28,378,355.54, 39,162,129.12 and 15,325,613.18
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Solution
The fourth proportional to 28,378,355.54, 39,162,129.12 and 15,325,613.18 is: 21,149,345.36
Step by Step Solution
- Step 1: Write the proportion equation
28,378,355.54 : 39,162,129.12 = 15,325,613.18 : x - Step 2: Convert to fraction form
28,378,355.54/39,162,129.12 = 15,325,613.18/x - Step 3: Cross multiply
28,378,355.54x = 39,162,129.12 × 15,325,613.18 - Step 4: Simplify right side
28,378,355.54x = 600,183,642,198,333.75 - Step 5: Solve for x
x = 600,183,642,198,333.75/28,378,355.54 - Step 6: Final answer
x = 21,149,345.36
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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.