Finding the Fourth Proportional to 10,478,412.60, 15,717,618.90 and 4,419,985.20
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Solution
The fourth proportional to 10,478,412.60, 15,717,618.90 and 4,419,985.20 is: 6,629,977.80
Step by Step Solution
- Step 1: Write the proportion equation
10,478,412.60 : 15,717,618.90 = 4,419,985.20 : x - Step 2: Convert to fraction form
10,478,412.60/15,717,618.90 = 4,419,985.20/x - Step 3: Cross multiply
10,478,412.60x = 15,717,618.90 × 4,419,985.20 - Step 4: Simplify right side
10,478,412.60x = 69,471,642,917,240.28 - Step 5: Solve for x
x = 69,471,642,917,240.28/10,478,412.60 - Step 6: Final answer
x = 6,629,977.80
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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.