Finding the Fourth Proportional to 19,977,136.40, 29,979,701.40 and 12,806,109.20
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Solution
The fourth proportional to 19,977,136.40, 29,979,701.40 and 12,806,109.20 is: 19,218,136.28
Step by Step Solution
- Step 1: Write the proportion equation
19,977,136.40 : 29,979,701.40 = 12,806,109.20 : x - Step 2: Convert to fraction form
19,977,136.40/29,979,701.40 = 12,806,109.20/x - Step 3: Cross multiply
19,977,136.40x = 29,979,701.40 × 12,806,109.20 - Step 4: Simplify right side
19,977,136.40x = 383,923,329,911,792.81 - Step 5: Solve for x
x = 383,923,329,911,792.81/19,977,136.40 - Step 6: Final answer
x = 19,218,136.28
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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.