Finding the Fourth Proportional to 20,986,319.19, 31,455,598.77 and 12,770,842.05
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Solution
The fourth proportional to 20,986,319.19, 31,455,598.77 and 12,770,842.05 is: 19,141,731.33
Step by Step Solution
- Step 1: Write the proportion equation
20,986,319.19 : 31,455,598.77 = 12,770,842.05 : x - Step 2: Convert to fraction form
20,986,319.19/31,455,598.77 = 12,770,842.05/x - Step 3: Cross multiply
20,986,319.19x = 31,455,598.77 × 12,770,842.05 - Step 4: Simplify right side
20,986,319.19x = 401,714,483,479,844.31 - Step 5: Solve for x
x = 401,714,483,479,844.31/20,986,319.19 - Step 6: Final answer
x = 19,141,731.33
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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.