Finding the Fourth Proportional to 15,725,159.12, 21,697,129.20 and 8,847,131.60
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Solution
The fourth proportional to 15,725,159.12, 21,697,129.20 and 8,847,131.60 is: 12,207,021.62
Step by Step Solution
- Step 1: Write the proportion equation
15,725,159.12 : 21,697,129.20 = 8,847,131.60 : x - Step 2: Convert to fraction form
15,725,159.12/21,697,129.20 = 8,847,131.60/x - Step 3: Cross multiply
15,725,159.12x = 21,697,129.20 × 8,847,131.60 - Step 4: Simplify right side
15,725,159.12x = 191,957,357,374,602.72 - Step 5: Solve for x
x = 191,957,357,374,602.72/15,725,159.12 - Step 6: Final answer
x = 12,207,021.62
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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.