Finding the Fourth Proportional to 28,012,513.12, 38,657,268.18 and 15,135,457.12
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Solution
The fourth proportional to 28,012,513.12, 38,657,268.18 and 15,135,457.12 is: 20,886,930.87
Step by Step Solution
- Step 1: Write the proportion equation
28,012,513.12 : 38,657,268.18 = 15,135,457.12 : x - Step 2: Convert to fraction form
28,012,513.12/38,657,268.18 = 15,135,457.12/x - Step 3: Cross multiply
28,012,513.12x = 38,657,268.18 × 15,135,457.12 - Step 4: Simplify right side
28,012,513.12x = 585,095,424,914,730.38 - Step 5: Solve for x
x = 585,095,424,914,730.38/28,012,513.12 - Step 6: Final answer
x = 20,886,930.87
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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.