Finding the Fourth Proportional to 13,221,816.17, 18,247,886.70 and 7,420,915.31
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Solution
The fourth proportional to 13,221,816.17, 18,247,886.70 and 7,420,915.31 is: 10,241,862.39
Step by Step Solution
- Step 1: Write the proportion equation
13,221,816.17 : 18,247,886.70 = 7,420,915.31 : x - Step 2: Convert to fraction form
13,221,816.17/18,247,886.70 = 7,420,915.31/x - Step 3: Cross multiply
13,221,816.17x = 18,247,886.70 × 7,420,915.31 - Step 4: Simplify right side
13,221,816.17x = 135,416,021,787,175.36 - Step 5: Solve for x
x = 135,416,021,787,175.36/13,221,816.17 - Step 6: Final answer
x = 10,241,862.39
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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.