Finding the Fourth Proportional to 15,781,135.42, 21,777,751.83 and 8,811,920.62
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Solution
The fourth proportional to 15,781,135.42, 21,777,751.83 and 8,811,920.62 is: 12,160,330.38
Step by Step Solution
- Step 1: Write the proportion equation
15,781,135.42 : 21,777,751.83 = 8,811,920.62 : x - Step 2: Convert to fraction form
15,781,135.42/21,777,751.83 = 8,811,920.62/x - Step 3: Cross multiply
15,781,135.42x = 21,777,751.83 × 8,811,920.62 - Step 4: Simplify right side
15,781,135.42x = 191,903,820,408,019.69 - Step 5: Solve for x
x = 191,903,820,408,019.69/15,781,135.42 - Step 6: Final answer
x = 12,160,330.38
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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.