Finding the Fourth Proportional to 21,053,647.28, 29,058,636.84 and 13,328,987.60
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Solution
The fourth proportional to 21,053,647.28, 29,058,636.84 and 13,328,987.60 is: 18,396,917.41
Step by Step Solution
- Step 1: Write the proportion equation
21,053,647.28 : 29,058,636.84 = 13,328,987.60 : x - Step 2: Convert to fraction form
21,053,647.28/29,058,636.84 = 13,328,987.60/x - Step 3: Cross multiply
21,053,647.28x = 29,058,636.84 × 13,328,987.60 - Step 4: Simplify right side
21,053,647.28x = 387,322,210,113,263.19 - Step 5: Solve for x
x = 387,322,210,113,263.19/21,053,647.28 - Step 6: Final answer
x = 18,396,917.41
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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.