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Finding the Third Proportional to 11,139 and 19,800.75

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Solution

The third proportional to 11,139 and 19,800.75 is: 35,197.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,139 : 19,800.75 = 19,800.75 : x
  2. Step 2: Convert to fraction form
    11,139/19,800.75 = 19,800.75/x
  3. Step 3: Cross multiply
    11,139x = 19,800.75 × 19,800.75
  4. Step 4: Simplify right side
    11,139x = 392,069,700.56
  5. Step 5: Solve for x
    x = 392,069,700.56/11,139
  6. Step 6: Final answer
    x = 35,197.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.78) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.