Finding the Fourth Proportional to 7,869.17, 11,820.15 and 6,638.99
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Solution
The fourth proportional to 7,869.17, 11,820.15 and 6,638.99 is: 9,972.32
Step by Step Solution
- Step 1: Write the proportion equation
7,869.17 : 11,820.15 = 6,638.99 : x - Step 2: Convert to fraction form
7,869.17/11,820.15 = 6,638.99/x - Step 3: Cross multiply
7,869.17x = 11,820.15 × 6,638.99 - Step 4: Simplify right side
7,869.17x = 78,473,798.55 - Step 5: Solve for x
x = 78,473,798.55/7,869.17 - Step 6: Final answer
x = 9,972.32
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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.