Finding the Fourth Proportional to 21,187,919.30, 31,781,986.09 and 6,613,617.09
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Solution
The fourth proportional to 21,187,919.30, 31,781,986.09 and 6,613,617.09 is: 9,920,459.08
Step by Step Solution
- Step 1: Write the proportion equation
21,187,919.30 : 31,781,986.09 = 6,613,617.09 : x - Step 2: Convert to fraction form
21,187,919.30/31,781,986.09 = 6,613,617.09/x - Step 3: Cross multiply
21,187,919.30x = 31,781,986.09 × 6,613,617.09 - Step 4: Simplify right side
21,187,919.30x = 210,193,886,473,241.44 - Step 5: Solve for x
x = 210,193,886,473,241.44/21,187,919.30 - Step 6: Final answer
x = 9,920,459.08
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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.