Finding the Fourth Proportional to 13,285,408.40, 19,965,437.40 and 11,643,117.20
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Solution
The fourth proportional to 13,285,408.40, 19,965,437.40 and 11,643,117.20 is: 17,497,386.65
Step by Step Solution
- Step 1: Write the proportion equation
13,285,408.40 : 19,965,437.40 = 11,643,117.20 : x - Step 2: Convert to fraction form
13,285,408.40/19,965,437.40 = 11,643,117.20/x - Step 3: Cross multiply
13,285,408.40x = 19,965,437.40 × 11,643,117.20 - Step 4: Simplify right side
13,285,408.40x = 232,459,927,597,463.25 - Step 5: Solve for x
x = 232,459,927,597,463.25/13,285,408.40 - Step 6: Final answer
x = 17,497,386.65
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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.