Finding the Fourth Proportional to 21,320,776.64, 29,422,671.46 and 11,531,221.68
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Solution
The fourth proportional to 21,320,776.64, 29,422,671.46 and 11,531,221.68 is: 15,913,085.75
Step by Step Solution
- Step 1: Write the proportion equation
21,320,776.64 : 29,422,671.46 = 11,531,221.68 : x - Step 2: Convert to fraction form
21,320,776.64/29,422,671.46 = 11,531,221.68/x - Step 3: Cross multiply
21,320,776.64x = 29,422,671.46 × 11,531,221.68 - Step 4: Simplify right side
21,320,776.64x = 339,279,347,023,069.25 - Step 5: Solve for x
x = 339,279,347,023,069.25/21,320,776.64 - Step 6: Final answer
x = 15,913,085.75
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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.