Finding the Fourth Proportional to 19,653,430.55, 27,121,841.75 and 11,398,385.81
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Solution
The fourth proportional to 19,653,430.55, 27,121,841.75 and 11,398,385.81 is: 15,729,834.83
Step by Step Solution
- Step 1: Write the proportion equation
19,653,430.55 : 27,121,841.75 = 11,398,385.81 : x - Step 2: Convert to fraction form
19,653,430.55/27,121,841.75 = 11,398,385.81/x - Step 3: Cross multiply
19,653,430.55x = 27,121,841.75 × 11,398,385.81 - Step 4: Simplify right side
19,653,430.55x = 309,145,216,240,566.12 - Step 5: Solve for x
x = 309,145,216,240,566.12/19,653,430.55 - Step 6: Final answer
x = 15,729,834.83
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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.