Finding the Fourth Proportional to 19,920,070.80, 29,880,106.20 and 18,124,981.20
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Solution
The fourth proportional to 19,920,070.80, 29,880,106.20 and 18,124,981.20 is: 27,187,471.80
Step by Step Solution
- Step 1: Write the proportion equation
19,920,070.80 : 29,880,106.20 = 18,124,981.20 : x - Step 2: Convert to fraction form
19,920,070.80/29,880,106.20 = 18,124,981.20/x - Step 3: Cross multiply
19,920,070.80x = 29,880,106.20 × 18,124,981.20 - Step 4: Simplify right side
19,920,070.80x = 541,576,363,129,003.38 - Step 5: Solve for x
x = 541,576,363,129,003.38/19,920,070.80 - Step 6: Final answer
x = 27,187,471.80
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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.