Finding the Fourth Proportional to 21,051,346.47, 29,079,291.99 and 15,863,568.78
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Solution
The fourth proportional to 21,051,346.47, 29,079,291.99 and 15,863,568.78 is: 21,913,151.69
Step by Step Solution
- Step 1: Write the proportion equation
21,051,346.47 : 29,079,291.99 = 15,863,568.78 : x - Step 2: Convert to fraction form
21,051,346.47/29,079,291.99 = 15,863,568.78/x - Step 3: Cross multiply
21,051,346.47x = 29,079,291.99 × 15,863,568.78 - Step 4: Simplify right side
21,051,346.47x = 461,301,348,557,068 - Step 5: Solve for x
x = 461,301,348,557,068/21,051,346.47 - Step 6: Final answer
x = 21,913,151.69
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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.