Finding the Fourth Proportional to 13,287,128.70, 18,336,238.07 and 7,175,557.20
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Solution
The fourth proportional to 13,287,128.70, 18,336,238.07 and 7,175,557.20 is: 9,902,269.19
Step by Step Solution
- Step 1: Write the proportion equation
13,287,128.70 : 18,336,238.07 = 7,175,557.20 : x - Step 2: Convert to fraction form
13,287,128.70/18,336,238.07 = 7,175,557.20/x - Step 3: Cross multiply
13,287,128.70x = 18,336,238.07 × 7,175,557.20 - Step 4: Simplify right side
13,287,128.70x = 131,572,725,104,102.61 - Step 5: Solve for x
x = 131,572,725,104,102.61/13,287,128.70 - Step 6: Final answer
x = 9,902,269.19
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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.