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Finding the Third Proportional to 15,189 and 20,218.50

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Solution

The third proportional to 15,189 and 20,218.50 is: 26,913.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,189 : 20,218.50 = 20,218.50 : x
  2. Step 2: Convert to fraction form
    15,189/20,218.50 = 20,218.50/x
  3. Step 3: Cross multiply
    15,189x = 20,218.50 × 20,218.50
  4. Step 4: Simplify right side
    15,189x = 408,787,742.25
  5. Step 5: Solve for x
    x = 408,787,742.25/15,189
  6. Step 6: Final answer
    x = 26,913.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.