Finding the Fourth Proportional to 13,128,951.18, 18,117,977.70 and 7,248,596.74
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Solution
The fourth proportional to 13,128,951.18, 18,117,977.70 and 7,248,596.74 is: 10,003,077.34
Step by Step Solution
- Step 1: Write the proportion equation
13,128,951.18 : 18,117,977.70 = 7,248,596.74 : x - Step 2: Convert to fraction form
13,128,951.18/18,117,977.70 = 7,248,596.74/x - Step 3: Cross multiply
13,128,951.18x = 18,117,977.70 × 7,248,596.74 - Step 4: Simplify right side
13,128,951.18x = 131,329,914,012,336.33 - Step 5: Solve for x
x = 131,329,914,012,336.33/13,128,951.18 - Step 6: Final answer
x = 10,003,077.34
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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.