Finding the Fourth Proportional to 15,378,818.24, 21,221,921.40 and 8,502,846.80
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Solution
The fourth proportional to 15,378,818.24, 21,221,921.40 and 8,502,846.80 is: 11,733,459.86
Step by Step Solution
- Step 1: Write the proportion equation
15,378,818.24 : 21,221,921.40 = 8,502,846.80 : x - Step 2: Convert to fraction form
15,378,818.24/21,221,921.40 = 8,502,846.80/x - Step 3: Cross multiply
15,378,818.24x = 21,221,921.40 × 8,502,846.80 - Step 4: Simplify right side
15,378,818.24x = 180,446,746,465,841.53 - Step 5: Solve for x
x = 180,446,746,465,841.53/15,378,818.24 - Step 6: Final answer
x = 11,733,459.86
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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.