Finding the Fourth Proportional to 13,128,957.36, 18,103,678.20 and 8,536,762.80
Calculator
Solution
The fourth proportional to 13,128,957.36, 18,103,678.20 and 8,536,762.80 is: 11,771,445.54
Step by Step Solution
- Step 1: Write the proportion equation
13,128,957.36 : 18,103,678.20 = 8,536,762.80 : x - Step 2: Convert to fraction form
13,128,957.36/18,103,678.20 = 8,536,762.80/x - Step 3: Cross multiply
13,128,957.36x = 18,103,678.20 × 8,536,762.80 - Step 4: Simplify right side
13,128,957.36x = 154,546,806,600,930.97 - Step 5: Solve for x
x = 154,546,806,600,930.97/13,128,957.36 - Step 6: Final answer
x = 11,771,445.54
Related Problems
Find fourth proportional to 6,564,478.68, 9,051,839.10 and 4,268,381.40
Half scale
Find fourth proportional to 26,257,914.72, 36,207,356.40 and 17,073,525.60
Double scale
Find fourth proportional to 13,128,958.36, 18,103,679.58 and 8,536,763.80
Similar ratio
Find fourth proportional to 19,693,436.04, 27,155,517.30 and 12,805,144.20
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.