Finding the Fourth Proportional to 21,178,478.19, 29,226,881.65 and 11,886,625.97
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Solution
The fourth proportional to 21,178,478.19, 29,226,881.65 and 11,886,625.97 is: 16,403,870.35
Step by Step Solution
- Step 1: Write the proportion equation
21,178,478.19 : 29,226,881.65 = 11,886,625.97 : x - Step 2: Convert to fraction form
21,178,478.19/29,226,881.65 = 11,886,625.97/x - Step 3: Cross multiply
21,178,478.19x = 29,226,881.65 × 11,886,625.97 - Step 4: Simplify right side
21,178,478.19x = 347,409,010,399,031.81 - Step 5: Solve for x
x = 347,409,010,399,031.81/21,178,478.19 - Step 6: Final answer
x = 16,403,870.35
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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.