Finding the Fourth Proportional to 21,317,994.80, 29,428,440.12 and 13,593,420.08
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Solution
The fourth proportional to 21,317,994.80, 29,428,440.12 and 13,593,420.08 is: 18,765,045.80
Step by Step Solution
- Step 1: Write the proportion equation
21,317,994.80 : 29,428,440.12 = 13,593,420.08 : x - Step 2: Convert to fraction form
21,317,994.80/29,428,440.12 = 13,593,420.08/x - Step 3: Cross multiply
21,317,994.80x = 29,428,440.12 × 13,593,420.08 - Step 4: Simplify right side
21,317,994.80x = 400,033,148,850,285.62 - Step 5: Solve for x
x = 400,033,148,850,285.62/21,317,994.80 - Step 6: Final answer
x = 18,765,045.80
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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.