Finding the Fourth Proportional to 71,280.84, 106,927.74 and 18,690.12
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Solution
The fourth proportional to 71,280.84, 106,927.74 and 18,690.12 is: 28,036.88
Step by Step Solution
- Step 1: Write the proportion equation
71,280.84 : 106,927.74 = 18,690.12 : x - Step 2: Convert to fraction form
71,280.84/106,927.74 = 18,690.12/x - Step 3: Cross multiply
71,280.84x = 106,927.74 × 18,690.12 - Step 4: Simplify right side
71,280.84x = 1,998,492,291.93 - Step 5: Solve for x
x = 1,998,492,291.93/71,280.84 - Step 6: Final answer
x = 28,036.88
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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.