Finding the Fourth Proportional to 13,438,312.10, 18,546,445.09 and 7,637,965.74
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Solution
The fourth proportional to 13,438,312.10, 18,546,445.09 and 7,637,965.74 is: 10,541,287.56
Step by Step Solution
- Step 1: Write the proportion equation
13,438,312.10 : 18,546,445.09 = 7,637,965.74 : x - Step 2: Convert to fraction form
13,438,312.10/18,546,445.09 = 7,637,965.74/x - Step 3: Cross multiply
13,438,312.10x = 18,546,445.09 × 7,637,965.74 - Step 4: Simplify right side
13,438,312.10x = 141,657,112,103,479 - Step 5: Solve for x
x = 141,657,112,103,479/13,438,312.10 - Step 6: Final answer
x = 10,541,287.56
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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.