Finding the Fourth Proportional to 28,256,703.91, 38,991,586.16 and 15,864,377.02
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Solution
The fourth proportional to 28,256,703.91, 38,991,586.16 and 15,864,377.02 is: 21,891,343.92
Step by Step Solution
- Step 1: Write the proportion equation
28,256,703.91 : 38,991,586.16 = 15,864,377.02 : x - Step 2: Convert to fraction form
28,256,703.91/38,991,586.16 = 15,864,377.02/x - Step 3: Cross multiply
28,256,703.91x = 38,991,586.16 × 15,864,377.02 - Step 4: Simplify right side
28,256,703.91x = 618,577,223,450,054 - Step 5: Solve for x
x = 618,577,223,450,054/28,256,703.91 - Step 6: Final answer
x = 21,891,343.92
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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.