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Finding the Third Proportional to 15,400.88 and 20,139.75

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Solution

The third proportional to 15,400.88 and 20,139.75 is: 26,336.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,400.88 : 20,139.75 = 20,139.75 : x
  2. Step 2: Convert to fraction form
    15,400.88/20,139.75 = 20,139.75/x
  3. Step 3: Cross multiply
    15,400.88x = 20,139.75 × 20,139.75
  4. Step 4: Simplify right side
    15,400.88x = 405,609,530.06
  5. Step 5: Solve for x
    x = 405,609,530.06/15,400.88
  6. Step 6: Final answer
    x = 26,336.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.