Finding the Fourth Proportional to 13,128,963.36, 18,103,686.48 and 8,536,768.80
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Solution
The fourth proportional to 13,128,963.36, 18,103,686.48 and 8,536,768.80 is: 11,771,453.82
Step by Step Solution
- Step 1: Write the proportion equation
13,128,963.36 : 18,103,686.48 = 8,536,768.80 : x - Step 2: Convert to fraction form
13,128,963.36/18,103,686.48 = 8,536,768.80/x - Step 3: Cross multiply
13,128,963.36x = 18,103,686.48 × 8,536,768.80 - Step 4: Simplify right side
13,128,963.36x = 154,546,985,907,445.84 - Step 5: Solve for x
x = 154,546,985,907,445.84/13,128,963.36 - Step 6: Final answer
x = 11,771,453.82
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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.