Finding the Fourth Proportional to 15,305,900.84, 21,122,142.14 and 8,430,382.90
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Solution
The fourth proportional to 15,305,900.84, 21,122,142.14 and 8,430,382.90 is: 11,633,927.84
Step by Step Solution
- Step 1: Write the proportion equation
15,305,900.84 : 21,122,142.14 = 8,430,382.90 : x - Step 2: Convert to fraction form
15,305,900.84/21,122,142.14 = 8,430,382.90/x - Step 3: Cross multiply
15,305,900.84x = 21,122,142.14 × 8,430,382.90 - Step 4: Simplify right side
15,305,900.84x = 178,067,745,908,483.12 - Step 5: Solve for x
x = 178,067,745,908,483.12/15,305,900.84 - Step 6: Final answer
x = 11,633,927.84
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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.