Finding the Fourth Proportional to 20,317.04, 28,054.82 and 12,775.99
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Solution
The fourth proportional to 20,317.04, 28,054.82 and 12,775.99 is: 17,641.75
Step by Step Solution
- Step 1: Write the proportion equation
20,317.04 : 28,054.82 = 12,775.99 : x - Step 2: Convert to fraction form
20,317.04/28,054.82 = 12,775.99/x - Step 3: Cross multiply
20,317.04x = 28,054.82 × 12,775.99 - Step 4: Simplify right side
20,317.04x = 358,428,099.77 - Step 5: Solve for x
x = 358,428,099.77/20,317.04 - Step 6: Final answer
x = 17,641.75
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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.