Finding the Fourth Proportional to 12,292,287.60, 18,438,431.40 and 8,261,209.20
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Solution
The fourth proportional to 12,292,287.60, 18,438,431.40 and 8,261,209.20 is: 12,391,813.80
Step by Step Solution
- Step 1: Write the proportion equation
12,292,287.60 : 18,438,431.40 = 8,261,209.20 : x - Step 2: Convert to fraction form
12,292,287.60/18,438,431.40 = 8,261,209.20/x - Step 3: Cross multiply
12,292,287.60x = 18,438,431.40 × 8,261,209.20 - Step 4: Simplify right side
12,292,287.60x = 152,323,739,115,248.88 - Step 5: Solve for x
x = 152,323,739,115,248.88/12,292,287.60 - Step 6: Final answer
x = 12,391,813.80
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Double scale
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Similar ratio
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1.5x scale
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.