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Finding the Third Proportional to 13,429 and 20,439.50

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Solution

The third proportional to 13,429 and 20,439.50 is: 31,109.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,429 : 20,439.50 = 20,439.50 : x
  2. Step 2: Convert to fraction form
    13,429/20,439.50 = 20,439.50/x
  3. Step 3: Cross multiply
    13,429x = 20,439.50 × 20,439.50
  4. Step 4: Simplify right side
    13,429x = 417,773,160.25
  5. Step 5: Solve for x
    x = 417,773,160.25/13,429
  6. Step 6: Final answer
    x = 31,109.77

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.