Finding the Fourth Proportional to 20,887,218.80, 31,330,828.20 and 19,092,129.20
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Solution
The fourth proportional to 20,887,218.80, 31,330,828.20 and 19,092,129.20 is: 28,638,193.80
Step by Step Solution
- Step 1: Write the proportion equation
20,887,218.80 : 31,330,828.20 = 19,092,129.20 : x - Step 2: Convert to fraction form
20,887,218.80/31,330,828.20 = 19,092,129.20/x - Step 3: Cross multiply
20,887,218.80x = 31,330,828.20 × 19,092,129.20 - Step 4: Simplify right side
20,887,218.80x = 598,172,219,937,403.38 - Step 5: Solve for x
x = 598,172,219,937,403.38/20,887,218.80 - Step 6: Final answer
x = 28,638,193.80
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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.