Finding the Fourth Proportional to 11,220,982.68, 15,477,775.74 and 7,781,968.92
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Solution
The fourth proportional to 11,220,982.68, 15,477,775.74 and 7,781,968.92 is: 10,734,137.39
Step by Step Solution
- Step 1: Write the proportion equation
11,220,982.68 : 15,477,775.74 = 7,781,968.92 : x - Step 2: Convert to fraction form
11,220,982.68/15,477,775.74 = 7,781,968.92/x - Step 3: Cross multiply
11,220,982.68x = 15,477,775.74 × 7,781,968.92 - Step 4: Simplify right side
11,220,982.68x = 120,447,569,759,410 - Step 5: Solve for x
x = 120,447,569,759,410/11,220,982.68 - Step 6: Final answer
x = 10,734,137.39
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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.