Finding the Fourth Proportional to 31,169,676.18, 42,986,305.62 and 19,568,321.58
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Solution
The fourth proportional to 31,169,676.18, 42,986,305.62 and 19,568,321.58 is: 26,986,801.12
Step by Step Solution
- Step 1: Write the proportion equation
31,169,676.18 : 42,986,305.62 = 19,568,321.58 : x - Step 2: Convert to fraction form
31,169,676.18/42,986,305.62 = 19,568,321.58/x - Step 3: Cross multiply
31,169,676.18x = 42,986,305.62 × 19,568,321.58 - Step 4: Simplify right side
31,169,676.18x = 841,169,851,908,321.12 - Step 5: Solve for x
x = 841,169,851,908,321.12/31,169,676.18 - Step 6: Final answer
x = 26,986,801.12
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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.