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Finding the Third Proportional to 18,130.50 and 38,439

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Solution

The third proportional to 18,130.50 and 38,439 is: 81,495.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,130.50 : 38,439 = 38,439 : x
  2. Step 2: Convert to fraction form
    18,130.50/38,439 = 38,439/x
  3. Step 3: Cross multiply
    18,130.50x = 38,439 × 38,439
  4. Step 4: Simplify right side
    18,130.50x = 1,477,556,721
  5. Step 5: Solve for x
    x = 1,477,556,721/18,130.50
  6. Step 6: Final answer
    x = 81,495.64

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.