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Finding the Third Proportional to 18,420.75 and 28,350

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Solution

The third proportional to 18,420.75 and 28,350 is: 43,631.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,420.75 : 28,350 = 28,350 : x
  2. Step 2: Convert to fraction form
    18,420.75/28,350 = 28,350/x
  3. Step 3: Cross multiply
    18,420.75x = 28,350 × 28,350
  4. Step 4: Simplify right side
    18,420.75x = 803,722,500
  5. Step 5: Solve for x
    x = 803,722,500/18,420.75
  6. Step 6: Final answer
    x = 43,631.37

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.