Finding the Fourth Proportional to 10,387.60, 15,582 and 2,991.88
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Solution
The fourth proportional to 10,387.60, 15,582 and 2,991.88 is: 4,487.99
Step by Step Solution
- Step 1: Write the proportion equation
10,387.60 : 15,582 = 2,991.88 : x - Step 2: Convert to fraction form
10,387.60/15,582 = 2,991.88/x - Step 3: Cross multiply
10,387.60x = 15,582 × 2,991.88 - Step 4: Simplify right side
10,387.60x = 46,619,474.16 - Step 5: Solve for x
x = 46,619,474.16/10,387.60 - Step 6: Final answer
x = 4,487.99
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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.