Finding the Fourth Proportional to 39,991,631.04, 55,188,341.28 and 21,656,911.68
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Solution
The fourth proportional to 39,991,631.04, 55,188,341.28 and 21,656,911.68 is: 29,886,478.79
Step by Step Solution
- Step 1: Write the proportion equation
39,991,631.04 : 55,188,341.28 = 21,656,911.68 : x - Step 2: Convert to fraction form
39,991,631.04/55,188,341.28 = 21,656,911.68/x - Step 3: Cross multiply
39,991,631.04x = 55,188,341.28 × 21,656,911.68 - Step 4: Simplify right side
39,991,631.04x = 1,195,209,032,866,658.25 - Step 5: Solve for x
x = 1,195,209,032,866,658.25/39,991,631.04 - Step 6: Final answer
x = 29,886,478.79
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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.