Finding the Fourth Proportional to 21,409,595.20, 29,540,177.35 and 12,117,165.06
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Solution
The fourth proportional to 21,409,595.20, 29,540,177.35 and 12,117,165.06 is: 16,718,821.70
Step by Step Solution
- Step 1: Write the proportion equation
21,409,595.20 : 29,540,177.35 = 12,117,165.06 : x - Step 2: Convert to fraction form
21,409,595.20/29,540,177.35 = 12,117,165.06/x - Step 3: Cross multiply
21,409,595.20x = 29,540,177.35 × 12,117,165.06 - Step 4: Simplify right side
21,409,595.20x = 357,943,204,821,330.50 - Step 5: Solve for x
x = 357,943,204,821,330.50/21,409,595.20 - Step 6: Final answer
x = 16,718,821.70
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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.