Finding the Fourth Proportional to 38,639,340.72, 53,323,490.16 and 21,235,369.68
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Solution
The fourth proportional to 38,639,340.72, 53,323,490.16 and 21,235,369.68 is: 29,305,469.63
Step by Step Solution
- Step 1: Write the proportion equation
38,639,340.72 : 53,323,490.16 = 21,235,369.68 : x - Step 2: Convert to fraction form
38,639,340.72/53,323,490.16 = 21,235,369.68/x - Step 3: Cross multiply
38,639,340.72x = 53,323,490.16 × 21,235,369.68 - Step 4: Simplify right side
38,639,340.72x = 1,132,344,026,175,442.25 - Step 5: Solve for x
x = 1,132,344,026,175,442.25/38,639,340.72 - Step 6: Final answer
x = 29,305,469.63
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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.