Finding the Fourth Proportional to 20,212,691.28, 27,893,878.92 and 11,045,720.40
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Solution
The fourth proportional to 20,212,691.28, 27,893,878.92 and 11,045,720.40 is: 15,243,293.59
Step by Step Solution
- Step 1: Write the proportion equation
20,212,691.28 : 27,893,878.92 = 11,045,720.40 : x - Step 2: Convert to fraction form
20,212,691.28/27,893,878.92 = 11,045,720.40/x - Step 3: Cross multiply
20,212,691.28x = 27,893,878.92 × 11,045,720.40 - Step 4: Simplify right side
20,212,691.28x = 308,107,987,421,774 - Step 5: Solve for x
x = 308,107,987,421,774/20,212,691.28 - Step 6: Final answer
x = 15,243,293.59
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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.