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Finding the Third Proportional to 18,619.50 and 39,904.25

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Solution

The third proportional to 18,619.50 and 39,904.25 is: 85,520.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,619.50 : 39,904.25 = 39,904.25 : x
  2. Step 2: Convert to fraction form
    18,619.50/39,904.25 = 39,904.25/x
  3. Step 3: Cross multiply
    18,619.50x = 39,904.25 × 39,904.25
  4. Step 4: Simplify right side
    18,619.50x = 1,592,349,168.06
  5. Step 5: Solve for x
    x = 1,592,349,168.06/18,619.50
  6. Step 6: Final answer
    x = 85,520.51

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.