Finding the Fourth Proportional to 31,421,924.36, 43,361,574.78 and 18,191,658.75
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Solution
The fourth proportional to 31,421,924.36, 43,361,574.78 and 18,191,658.75 is: 25,104,094.90
Step by Step Solution
- Step 1: Write the proportion equation
31,421,924.36 : 43,361,574.78 = 18,191,658.75 : x - Step 2: Convert to fraction form
31,421,924.36/43,361,574.78 = 18,191,658.75/x - Step 3: Cross multiply
31,421,924.36x = 43,361,574.78 × 18,191,658.75 - Step 4: Simplify right side
31,421,924.36x = 788,818,971,165,979.12 - Step 5: Solve for x
x = 788,818,971,165,979.12/31,421,924.36 - Step 6: Final answer
x = 25,104,094.90
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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.