Finding the Fourth Proportional to 15,389,393.57, 21,237,383.80 and 8,420,725.84
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Solution
The fourth proportional to 15,389,393.57, 21,237,383.80 and 8,420,725.84 is: 11,620,612.96
Step by Step Solution
- Step 1: Write the proportion equation
15,389,393.57 : 21,237,383.80 = 8,420,725.84 : x - Step 2: Convert to fraction form
15,389,393.57/21,237,383.80 = 8,420,725.84/x - Step 3: Cross multiply
15,389,393.57x = 21,237,383.80 × 8,420,725.84 - Step 4: Simplify right side
15,389,393.57x = 178,834,186,390,366.88 - Step 5: Solve for x
x = 178,834,186,390,366.88/15,389,393.57 - Step 6: Final answer
x = 11,620,612.96
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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.