Finding the Fourth Proportional to 20,934,789.70, 28,890,026.25 and 11,642,156.99
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Solution
The fourth proportional to 20,934,789.70, 28,890,026.25 and 11,642,156.99 is: 16,066,185.81
Step by Step Solution
- Step 1: Write the proportion equation
20,934,789.70 : 28,890,026.25 = 11,642,156.99 : x - Step 2: Convert to fraction form
20,934,789.70/28,890,026.25 = 11,642,156.99/x - Step 3: Cross multiply
20,934,789.70x = 28,890,026.25 × 11,642,156.99 - Step 4: Simplify right side
20,934,789.70x = 336,342,221,047,721 - Step 5: Solve for x
x = 336,342,221,047,721/20,934,789.70 - Step 6: Final answer
x = 16,066,185.81
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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.