Finding the Fourth Proportional to 28,724,121.79, 39,639,231.93 and 15,671,389.55
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Solution
The fourth proportional to 28,724,121.79, 39,639,231.93 and 15,671,389.55 is: 21,626,486.95
Step by Step Solution
- Step 1: Write the proportion equation
28,724,121.79 : 39,639,231.93 = 15,671,389.55 : x - Step 2: Convert to fraction form
28,724,121.79/39,639,231.93 = 15,671,389.55/x - Step 3: Cross multiply
28,724,121.79x = 39,639,231.93 × 15,671,389.55 - Step 4: Simplify right side
28,724,121.79x = 621,201,844,898,399.88 - Step 5: Solve for x
x = 621,201,844,898,399.88/28,724,121.79 - Step 6: Final answer
x = 21,626,486.95
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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.