Finding the Fourth Proportional to 7,419,208.40, 11,128,812.60 and 6,687,000.80
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Solution
The fourth proportional to 7,419,208.40, 11,128,812.60 and 6,687,000.80 is: 10,030,501.20
Step by Step Solution
- Step 1: Write the proportion equation
7,419,208.40 : 11,128,812.60 = 6,687,000.80 : x - Step 2: Convert to fraction form
7,419,208.40/11,128,812.60 = 6,687,000.80/x - Step 3: Cross multiply
7,419,208.40x = 11,128,812.60 × 6,687,000.80 - Step 4: Simplify right side
7,419,208.40x = 74,418,378,759,250.08 - Step 5: Solve for x
x = 74,418,378,759,250.08/7,419,208.40 - Step 6: Final answer
x = 10,030,501.20
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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.