Finding the Fourth Proportional to 18,720,029.70, 28,080,044.55 and 15,696,720.90
Calculator
Solution
The fourth proportional to 18,720,029.70, 28,080,044.55 and 15,696,720.90 is: 23,545,081.35
Step by Step Solution
- Step 1: Write the proportion equation
18,720,029.70 : 28,080,044.55 = 15,696,720.90 : x - Step 2: Convert to fraction form
18,720,029.70/28,080,044.55 = 15,696,720.90/x - Step 3: Cross multiply
18,720,029.70x = 28,080,044.55 × 15,696,720.90 - Step 4: Simplify right side
18,720,029.70x = 440,764,622,160,916.12 - Step 5: Solve for x
x = 440,764,622,160,916.12/18,720,029.70 - Step 6: Final answer
x = 23,545,081.35
Related Problems
Find fourth proportional to 9,360,014.85, 14,040,022.28 and 7,848,360.45
Half scale
Find fourth proportional to 37,440,059.40, 56,160,089.10 and 31,393,441.80
Double scale
Find fourth proportional to 18,720,030.70, 28,080,046.05 and 15,696,721.90
Similar ratio
Find fourth proportional to 28,080,044.55, 42,120,066.83 and 23,545,081.35
1.5x scale
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.