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Finding the Third Proportional to 18,720.50 and 40,722

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Solution

The third proportional to 18,720.50 and 40,722 is: 88,581.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,720.50 : 40,722 = 40,722 : x
  2. Step 2: Convert to fraction form
    18,720.50/40,722 = 40,722/x
  3. Step 3: Cross multiply
    18,720.50x = 40,722 × 40,722
  4. Step 4: Simplify right side
    18,720.50x = 1,658,281,284
  5. Step 5: Solve for x
    x = 1,658,281,284/18,720.50
  6. Step 6: Final answer
    x = 88,581.04

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.