Finding the Fourth Proportional to 20,709,853.40, 31,029,350.70 and 13,127,961.80
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Solution
The fourth proportional to 20,709,853.40, 31,029,350.70 and 13,127,961.80 is: 19,669,484.03
Step by Step Solution
- Step 1: Write the proportion equation
20,709,853.40 : 31,029,350.70 = 13,127,961.80 : x - Step 2: Convert to fraction form
20,709,853.40/31,029,350.70 = 13,127,961.80/x - Step 3: Cross multiply
20,709,853.40x = 31,029,350.70 × 13,127,961.80 - Step 4: Simplify right side
20,709,853.40x = 407,352,130,668,403.25 - Step 5: Solve for x
x = 407,352,130,668,403.25/20,709,853.40 - Step 6: Final answer
x = 19,669,484.03
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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.