Finding the Fourth Proportional to 13,188,455.40, 19,787,348.70 and 12,721,895.40
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Solution
The fourth proportional to 13,188,455.40, 19,787,348.70 and 12,721,895.40 is: 19,087,343.65
Step by Step Solution
- Step 1: Write the proportion equation
13,188,455.40 : 19,787,348.70 = 12,721,895.40 : x - Step 2: Convert to fraction form
13,188,455.40/19,787,348.70 = 12,721,895.40/x - Step 3: Cross multiply
13,188,455.40x = 19,787,348.70 × 12,721,895.40 - Step 4: Simplify right side
13,188,455.40x = 251,732,580,404,725.97 - Step 5: Solve for x
x = 251,732,580,404,725.97/13,188,455.40 - Step 6: Final answer
x = 19,087,343.65
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.