Finding the Fourth Proportional to 20,421,781.62, 28,181,539.35 and 11,129,590.68
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Solution
The fourth proportional to 20,421,781.62, 28,181,539.35 and 11,129,590.68 is: 15,358,552.13
Step by Step Solution
- Step 1: Write the proportion equation
20,421,781.62 : 28,181,539.35 = 11,129,590.68 : x - Step 2: Convert to fraction form
20,421,781.62/28,181,539.35 = 11,129,590.68/x - Step 3: Cross multiply
20,421,781.62x = 28,181,539.35 × 11,129,590.68 - Step 4: Simplify right side
20,421,781.62x = 313,648,997,697,813.25 - Step 5: Solve for x
x = 313,648,997,697,813.25/20,421,781.62 - Step 6: Final answer
x = 15,358,552.13
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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.