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Finding the Third Proportional to 18,678.94 and 38,436.19

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Solution

The third proportional to 18,678.94 and 38,436.19 is: 79,091.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,678.94 : 38,436.19 = 38,436.19 : x
  2. Step 2: Convert to fraction form
    18,678.94/38,436.19 = 38,436.19/x
  3. Step 3: Cross multiply
    18,678.94x = 38,436.19 × 38,436.19
  4. Step 4: Simplify right side
    18,678.94x = 1,477,340,509.54
  5. Step 5: Solve for x
    x = 1,477,340,509.54/18,678.94
  6. Step 6: Final answer
    x = 79,091.25

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Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.