Finding the Fourth Proportional to 21,280,363.14, 31,803,946.74 and 15,535,194.78
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Solution
The fourth proportional to 21,280,363.14, 31,803,946.74 and 15,535,194.78 is: 23,217,672.75
Step by Step Solution
- Step 1: Write the proportion equation
21,280,363.14 : 31,803,946.74 = 15,535,194.78 : x - Step 2: Convert to fraction form
21,280,363.14/31,803,946.74 = 15,535,194.78/x - Step 3: Cross multiply
21,280,363.14x = 31,803,946.74 × 15,535,194.78 - Step 4: Simplify right side
21,280,363.14x = 494,080,507,378,646 - Step 5: Solve for x
x = 494,080,507,378,646/21,280,363.14 - Step 6: Final answer
x = 23,217,672.75
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Why These Related Problems?
These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.