Finding the Fourth Proportional to 20,785,445.62, 28,683,321.14 and 11,492,855.62
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Solution
The fourth proportional to 20,785,445.62, 28,683,321.14 and 11,492,855.62 is: 15,859,812.42
Step by Step Solution
- Step 1: Write the proportion equation
20,785,445.62 : 28,683,321.14 = 11,492,855.62 : x - Step 2: Convert to fraction form
20,785,445.62/28,683,321.14 = 11,492,855.62/x - Step 3: Cross multiply
20,785,445.62x = 28,683,321.14 × 11,492,855.62 - Step 4: Simplify right side
20,785,445.62x = 329,653,268,564,113.81 - Step 5: Solve for x
x = 329,653,268,564,113.81/20,785,445.62 - Step 6: Final answer
x = 15,859,812.42
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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.