Finding the Fourth Proportional to 21,687,138.54, 29,926,345.10 and 12,392,864.21
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Solution
The fourth proportional to 21,687,138.54, 29,926,345.10 and 12,392,864.21 is: 17,101,063.39
Step by Step Solution
- Step 1: Write the proportion equation
21,687,138.54 : 29,926,345.10 = 12,392,864.21 : x - Step 2: Convert to fraction form
21,687,138.54/29,926,345.10 = 12,392,864.21/x - Step 3: Cross multiply
21,687,138.54x = 29,926,345.10 × 12,392,864.21 - Step 4: Simplify right side
21,687,138.54x = 370,873,130,914,302.81 - Step 5: Solve for x
x = 370,873,130,914,302.81/21,687,138.54 - Step 6: Final answer
x = 17,101,063.39
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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.