Finding the Fourth Proportional to 15,646,996.87, 21,594,148.35 and 8,679,920.70
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Solution
The fourth proportional to 15,646,996.87, 21,594,148.35 and 8,679,920.70 is: 11,979,007.65
Step by Step Solution
- Step 1: Write the proportion equation
15,646,996.87 : 21,594,148.35 = 8,679,920.70 : x - Step 2: Convert to fraction form
15,646,996.87/21,594,148.35 = 8,679,920.70/x - Step 3: Cross multiply
15,646,996.87x = 21,594,148.35 × 8,679,920.70 - Step 4: Simplify right side
15,646,996.87x = 187,435,495,262,035.84 - Step 5: Solve for x
x = 187,435,495,262,035.84/15,646,996.87 - Step 6: Final answer
x = 11,979,007.65
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1.5x scale
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.