Finding the Fourth Proportional to 12,946,139.40, 19,423,874.70 and 5,378,536.20
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Solution
The fourth proportional to 12,946,139.40, 19,423,874.70 and 5,378,536.20 is: 8,069,742.65
Step by Step Solution
- Step 1: Write the proportion equation
12,946,139.40 : 19,423,874.70 = 5,378,536.20 : x - Step 2: Convert to fraction form
12,946,139.40/19,423,874.70 = 5,378,536.20/x - Step 3: Cross multiply
12,946,139.40x = 19,423,874.70 × 5,378,536.20 - Step 4: Simplify right side
12,946,139.40x = 104,472,013,218,214.14 - Step 5: Solve for x
x = 104,472,013,218,214.14/12,946,139.40 - Step 6: Final answer
x = 8,069,742.65
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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.