Finding the Fourth Proportional to 28,218,891.84, 38,950,358.40 and 18,430,832.40
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Solution
The fourth proportional to 28,218,891.84, 38,950,358.40 and 18,430,832.40 is: 25,439,961.70
Step by Step Solution
- Step 1: Write the proportion equation
28,218,891.84 : 38,950,358.40 = 18,430,832.40 : x - Step 2: Convert to fraction form
28,218,891.84/38,950,358.40 = 18,430,832.40/x - Step 3: Cross multiply
28,218,891.84x = 38,950,358.40 × 18,430,832.40 - Step 4: Simplify right side
28,218,891.84x = 717,887,527,590,332.12 - Step 5: Solve for x
x = 717,887,527,590,332.12/28,218,891.84 - Step 6: Final answer
x = 25,439,961.70
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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.