Finding the Fourth Proportional to 8,221,511.80, 12,332,267.70 and 8,079,794.20
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Solution
The fourth proportional to 8,221,511.80, 12,332,267.70 and 8,079,794.20 is: 12,119,691.30
Step by Step Solution
- Step 1: Write the proportion equation
8,221,511.80 : 12,332,267.70 = 8,079,794.20 : x - Step 2: Convert to fraction form
8,221,511.80/12,332,267.70 = 8,079,794.20/x - Step 3: Cross multiply
8,221,511.80x = 12,332,267.70 × 8,079,794.20 - Step 4: Simplify right side
8,221,511.80x = 99,642,185,035,307.34 - Step 5: Solve for x
x = 99,642,185,035,307.34/8,221,511.80 - Step 6: Final answer
x = 12,119,691.30
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Double scale
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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.