Finding the Fourth Proportional to 31,455,879.40, 47,089,340.70 and 18,669,802.60
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Solution
The fourth proportional to 31,455,879.40, 47,089,340.70 and 18,669,802.60 is: 27,948,628.75
Step by Step Solution
- Step 1: Write the proportion equation
31,455,879.40 : 47,089,340.70 = 18,669,802.60 : x - Step 2: Convert to fraction form
31,455,879.40/47,089,340.70 = 18,669,802.60/x - Step 3: Cross multiply
31,455,879.40x = 47,089,340.70 × 18,669,802.60 - Step 4: Simplify right side
31,455,879.40x = 879,148,695,433,146 - Step 5: Solve for x
x = 879,148,695,433,146/31,455,879.40 - Step 6: Final answer
x = 27,948,628.75
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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.