Finding the Fourth Proportional to 20,465,671.68, 28,242,170.64 and 11,172,885.12
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Solution
The fourth proportional to 20,465,671.68, 28,242,170.64 and 11,172,885.12 is: 15,418,332.37
Step by Step Solution
- Step 1: Write the proportion equation
20,465,671.68 : 28,242,170.64 = 11,172,885.12 : x - Step 2: Convert to fraction form
20,465,671.68/28,242,170.64 = 11,172,885.12/x - Step 3: Cross multiply
20,465,671.68x = 28,242,170.64 × 11,172,885.12 - Step 4: Simplify right side
20,465,671.68x = 315,546,528,100,156.88 - Step 5: Solve for x
x = 315,546,528,100,156.88/20,465,671.68 - Step 6: Final answer
x = 15,418,332.37
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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.