Finding the Fourth Proportional to 19,919,688.40, 29,893,529.40 and 12,748,661.20
Calculator
Solution
The fourth proportional to 19,919,688.40, 29,893,529.40 and 12,748,661.20 is: 19,131,949.79
Step by Step Solution
- Step 1: Write the proportion equation
19,919,688.40 : 29,893,529.40 = 12,748,661.20 : x - Step 2: Convert to fraction form
19,919,688.40/29,893,529.40 = 12,748,661.20/x - Step 3: Cross multiply
19,919,688.40x = 29,893,529.40 × 12,748,661.20 - Step 4: Simplify right side
19,919,688.40x = 381,102,478,392,839.25 - Step 5: Solve for x
x = 381,102,478,392,839.25/19,919,688.40 - Step 6: Final answer
x = 19,131,949.79
Related Problems
Find fourth proportional to 9,959,844.20, 14,946,764.70 and 6,374,330.60
Half scale
Find fourth proportional to 39,839,376.80, 59,787,058.80 and 25,497,322.40
Double scale
Find fourth proportional to 19,919,689.40, 29,893,530.90 and 12,748,662.20
Similar ratio
Find fourth proportional to 29,879,532.60, 44,840,294.10 and 19,122,991.80
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.