Finding the Fourth Proportional to 12,721,406.09, 17,555,527.11 and 6,920,173.99
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Solution
The fourth proportional to 12,721,406.09, 17,555,527.11 and 6,920,173.99 is: 9,549,832.87
Step by Step Solution
- Step 1: Write the proportion equation
12,721,406.09 : 17,555,527.11 = 6,920,173.99 : x - Step 2: Convert to fraction form
12,721,406.09/17,555,527.11 = 6,920,173.99/x - Step 3: Cross multiply
12,721,406.09x = 17,555,527.11 × 6,920,173.99 - Step 4: Simplify right side
12,721,406.09x = 121,487,301,999,584.23 - Step 5: Solve for x
x = 121,487,301,999,584.23/12,721,406.09 - Step 6: Final answer
x = 9,549,832.87
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1.5x scale
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.