Finding the Fourth Proportional to 21,206,180.79, 29,266,904.79 and 12,838,162.91
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Solution
The fourth proportional to 21,206,180.79, 29,266,904.79 and 12,838,162.91 is: 17,718,102.81
Step by Step Solution
- Step 1: Write the proportion equation
21,206,180.79 : 29,266,904.79 = 12,838,162.91 : x - Step 2: Convert to fraction form
21,206,180.79/29,266,904.79 = 12,838,162.91/x - Step 3: Cross multiply
21,206,180.79x = 29,266,904.79 × 12,838,162.91 - Step 4: Simplify right side
21,206,180.79x = 375,733,291,419,144.81 - Step 5: Solve for x
x = 375,733,291,419,144.81/21,206,180.79 - Step 6: Final answer
x = 17,718,102.81
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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.