Finding the Fourth Proportional to 18,821,809.20, 28,232,130.60 and 5,358,637.20
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Solution
The fourth proportional to 18,821,809.20, 28,232,130.60 and 5,358,637.20 is: 8,037,789.76
Step by Step Solution
- Step 1: Write the proportion equation
18,821,809.20 : 28,232,130.60 = 5,358,637.20 : x - Step 2: Convert to fraction form
18,821,809.20/28,232,130.60 = 5,358,637.20/x - Step 3: Cross multiply
18,821,809.20x = 28,232,130.60 × 5,358,637.20 - Step 4: Simplify right side
18,821,809.20x = 151,285,745,268,418.34 - Step 5: Solve for x
x = 151,285,745,268,418.34/18,821,809.20 - Step 6: Final answer
x = 8,037,789.76
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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.