Finding the Fourth Proportional to 18,408,962.88, 25,386,167.06 and 15,625,686.44
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Solution
The fourth proportional to 18,408,962.88, 25,386,167.06 and 15,625,686.44 is: 21,547,997.52
Step by Step Solution
- Step 1: Write the proportion equation
18,408,962.88 : 25,386,167.06 = 15,625,686.44 : x - Step 2: Convert to fraction form
18,408,962.88/25,386,167.06 = 15,625,686.44/x - Step 3: Cross multiply
18,408,962.88x = 25,386,167.06 × 15,625,686.44 - Step 4: Simplify right side
18,408,962.88x = 396,676,286,393,016.62 - Step 5: Solve for x
x = 396,676,286,393,016.62/18,408,962.88 - Step 6: Final answer
x = 21,547,997.52
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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.