Finding the Fourth Proportional to 21,122,535.95, 29,153,648.13 and 12,865,320.62
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Solution
The fourth proportional to 21,122,535.95, 29,153,648.13 and 12,865,320.62 is: 17,756,912.87
Step by Step Solution
- Step 1: Write the proportion equation
21,122,535.95 : 29,153,648.13 = 12,865,320.62 : x - Step 2: Convert to fraction form
21,122,535.95/29,153,648.13 = 12,865,320.62/x - Step 3: Cross multiply
21,122,535.95x = 29,153,648.13 × 12,865,320.62 - Step 4: Simplify right side
21,122,535.95x = 375,071,030,422,793.88 - Step 5: Solve for x
x = 375,071,030,422,793.88/21,122,535.95 - Step 6: Final answer
x = 17,756,912.87
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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.