Finding the Fourth Proportional to 20,779,805.20, 31,106,722.20 and 15,698,966.80
Calculator
Solution
The fourth proportional to 20,779,805.20, 31,106,722.20 and 15,698,966.80 is: 23,500,865.11
Step by Step Solution
- Step 1: Write the proportion equation
20,779,805.20 : 31,106,722.20 = 15,698,966.80 : x - Step 2: Convert to fraction form
20,779,805.20/31,106,722.20 = 15,698,966.80/x - Step 3: Cross multiply
20,779,805.20x = 31,106,722.20 × 15,698,966.80 - Step 4: Simplify right side
20,779,805.20x = 488,343,399,074,623 - Step 5: Solve for x
x = 488,343,399,074,623/20,779,805.20 - Step 6: Final answer
x = 23,500,865.11
Related Problems
Find fourth proportional to 10,389,902.60, 15,553,361.10 and 7,849,483.40
Half scale
Find fourth proportional to 41,559,610.40, 62,213,444.40 and 31,397,933.60
Double scale
Find fourth proportional to 20,779,806.20, 31,106,723.70 and 15,698,967.80
Similar ratio
Find fourth proportional to 31,169,707.80, 46,660,083.30 and 23,548,450.20
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.