Finding the Fourth Proportional to 13,122,080.70, 19,683,121.05 and 12,643,783.80
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Solution
The fourth proportional to 13,122,080.70, 19,683,121.05 and 12,643,783.80 is: 18,965,675.70
Step by Step Solution
- Step 1: Write the proportion equation
13,122,080.70 : 19,683,121.05 = 12,643,783.80 : x - Step 2: Convert to fraction form
13,122,080.70/19,683,121.05 = 12,643,783.80/x - Step 3: Cross multiply
13,122,080.70x = 19,683,121.05 × 12,643,783.80 - Step 4: Simplify right side
13,122,080.70x = 248,869,127,065,429 - Step 5: Solve for x
x = 248,869,127,065,429/13,122,080.70 - Step 6: Final answer
x = 18,965,675.70
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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.