Finding the Fourth Proportional to 10,640,563.20, 15,960,844.80 and 5,319,859.20
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Solution
The fourth proportional to 10,640,563.20, 15,960,844.80 and 5,319,859.20 is: 7,979,788.80
Step by Step Solution
- Step 1: Write the proportion equation
10,640,563.20 : 15,960,844.80 = 5,319,859.20 : x - Step 2: Convert to fraction form
10,640,563.20/15,960,844.80 = 5,319,859.20/x - Step 3: Cross multiply
10,640,563.20x = 15,960,844.80 × 5,319,859.20 - Step 4: Simplify right side
10,640,563.20x = 84,909,447,049,052.17 - Step 5: Solve for x
x = 84,909,447,049,052.17/10,640,563.20 - Step 6: Final answer
x = 7,979,788.80
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Why These Related Problems?
These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.