Finding the Fourth Proportional to 15,138,981.24, 20,891,879.82 and 8,263,312.44
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Solution
The fourth proportional to 15,138,981.24, 20,891,879.82 and 8,263,312.44 is: 11,403,417.95
Step by Step Solution
- Step 1: Write the proportion equation
15,138,981.24 : 20,891,879.82 = 8,263,312.44 : x - Step 2: Convert to fraction form
15,138,981.24/20,891,879.82 = 8,263,312.44/x - Step 3: Cross multiply
15,138,981.24x = 20,891,879.82 × 8,263,312.44 - Step 4: Simplify right side
15,138,981.24x = 172,636,130,411,590.97 - Step 5: Solve for x
x = 172,636,130,411,590.97/15,138,981.24 - Step 6: Final answer
x = 11,403,417.95
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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.