Finding the Fourth Proportional to 13,478.21, 18,599.68 and 7,509.75
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Solution
The fourth proportional to 13,478.21, 18,599.68 and 7,509.75 is: 10,363.31
Step by Step Solution
- Step 1: Write the proportion equation
13,478.21 : 18,599.68 = 7,509.75 : x - Step 2: Convert to fraction form
13,478.21/18,599.68 = 7,509.75/x - Step 3: Cross multiply
13,478.21x = 18,599.68 × 7,509.75 - Step 4: Simplify right side
13,478.21x = 139,678,890.99 - Step 5: Solve for x
x = 139,678,890.99/13,478.21 - Step 6: Final answer
x = 10,363.31
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1.5x scale
Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.