Finding the Fourth Proportional to 7,442,941.70, 11,164,412.55 and 7,128,013.70
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Solution
The fourth proportional to 7,442,941.70, 11,164,412.55 and 7,128,013.70 is: 10,692,020.55
Step by Step Solution
- Step 1: Write the proportion equation
7,442,941.70 : 11,164,412.55 = 7,128,013.70 : x - Step 2: Convert to fraction form
7,442,941.70/11,164,412.55 = 7,128,013.70/x - Step 3: Cross multiply
7,442,941.70x = 11,164,412.55 × 7,128,013.70 - Step 4: Simplify right side
7,442,941.70x = 79,580,085,608,851.94 - Step 5: Solve for x
x = 79,580,085,608,851.94/7,442,941.70 - Step 6: Final answer
x = 10,692,020.55
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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.