Finding the Fourth Proportional to 12,828,878.40, 17,689,664.88 and 8,175,291.60
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Solution
The fourth proportional to 12,828,878.40, 17,689,664.88 and 8,175,291.60 is: 11,272,861.45
Step by Step Solution
- Step 1: Write the proportion equation
12,828,878.40 : 17,689,664.88 = 8,175,291.60 : x - Step 2: Convert to fraction form
12,828,878.40/17,689,664.88 = 8,175,291.60/x - Step 3: Cross multiply
12,828,878.40x = 17,689,664.88 × 8,175,291.60 - Step 4: Simplify right side
12,828,878.40x = 144,618,168,700,279 - Step 5: Solve for x
x = 144,618,168,700,279/12,828,878.40 - Step 6: Final answer
x = 11,272,861.45
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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.