Finding the Fourth Proportional to 28,545,605.70, 39,392,974.74 and 15,492,864.75
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Solution
The fourth proportional to 28,545,605.70, 39,392,974.74 and 15,492,864.75 is: 21,380,174.45
Step by Step Solution
- Step 1: Write the proportion equation
28,545,605.70 : 39,392,974.74 = 15,492,864.75 : x - Step 2: Convert to fraction form
28,545,605.70/39,392,974.74 = 15,492,864.75/x - Step 3: Cross multiply
28,545,605.70x = 39,392,974.74 × 15,492,864.75 - Step 4: Simplify right side
28,545,605.70x = 610,310,029,746,986.50 - Step 5: Solve for x
x = 610,310,029,746,986.50/28,545,605.70 - Step 6: Final answer
x = 21,380,174.45
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1.5x scale
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.