Finding the Fourth Proportional to 20,831,423.40, 31,247,135.10 and 5,686,885.80
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Solution
The fourth proportional to 20,831,423.40, 31,247,135.10 and 5,686,885.80 is: 8,530,328.70
Step by Step Solution
- Step 1: Write the proportion equation
20,831,423.40 : 31,247,135.10 = 5,686,885.80 : x - Step 2: Convert to fraction form
20,831,423.40/31,247,135.10 = 5,686,885.80/x - Step 3: Cross multiply
20,831,423.40x = 31,247,135.10 × 5,686,885.80 - Step 4: Simplify right side
20,831,423.40x = 177,698,888,890,871.59 - Step 5: Solve for x
x = 177,698,888,890,871.59/20,831,423.40 - Step 6: Final answer
x = 8,530,328.70
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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.