Finding the Fourth Proportional to 19,720,403.40, 29,580,605.10 and 11,217,347.40
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Solution
The fourth proportional to 19,720,403.40, 29,580,605.10 and 11,217,347.40 is: 16,826,021.10
Step by Step Solution
- Step 1: Write the proportion equation
19,720,403.40 : 29,580,605.10 = 11,217,347.40 : x - Step 2: Convert to fraction form
19,720,403.40/29,580,605.10 = 11,217,347.40/x - Step 3: Cross multiply
19,720,403.40x = 29,580,605.10 × 11,217,347.40 - Step 4: Simplify right side
19,720,403.40x = 331,815,923,708,911.75 - Step 5: Solve for x
x = 331,815,923,708,911.75/19,720,403.40 - Step 6: Final answer
x = 16,826,021.10
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.