Finding the Fourth Proportional to 12,220,309.80, 18,330,464.70 and 6,551,605.80
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Solution
The fourth proportional to 12,220,309.80, 18,330,464.70 and 6,551,605.80 is: 9,827,408.70
Step by Step Solution
- Step 1: Write the proportion equation
12,220,309.80 : 18,330,464.70 = 6,551,605.80 : x - Step 2: Convert to fraction form
12,220,309.80/18,330,464.70 = 6,551,605.80/x - Step 3: Cross multiply
12,220,309.80x = 18,330,464.70 × 6,551,605.80 - Step 4: Simplify right side
12,220,309.80x = 120,093,978,845,215.25 - Step 5: Solve for x
x = 120,093,978,845,215.25/12,220,309.80 - Step 6: Final answer
x = 9,827,408.70
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Double scale
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Similar ratio
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1.5x scale
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.