Finding the Fourth Proportional to 15,391,837.90, 21,240,984.79 and 8,423,120.95
Calculator
Solution
The fourth proportional to 15,391,837.90, 21,240,984.79 and 8,423,120.95 is: 11,624,042.90
Step by Step Solution
- Step 1: Write the proportion equation
15,391,837.90 : 21,240,984.79 = 8,423,120.95 : x - Step 2: Convert to fraction form
15,391,837.90/21,240,984.79 = 8,423,120.95/x - Step 3: Cross multiply
15,391,837.90x = 21,240,984.79 × 8,423,120.95 - Step 4: Simplify right side
15,391,837.90x = 178,915,383,983,280.31 - Step 5: Solve for x
x = 178,915,383,983,280.31/15,391,837.90 - Step 6: Final answer
x = 11,624,042.90
Related Problems
Find fourth proportional to 7,695,918.95, 10,620,492.40 and 4,211,560.48
Half scale
Find fourth proportional to 30,783,675.79, 42,481,969.58 and 16,846,241.90
Double scale
Find fourth proportional to 15,391,838.90, 21,240,986.17 and 8,423,121.95
Similar ratio
Find fourth proportional to 23,087,756.84, 31,861,477.19 and 12,634,681.43
1.5x scale
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.