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Finding the Third Proportional to 15,435 and 20,605.50

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Solution

The third proportional to 15,435 and 20,605.50 is: 27,508.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435 : 20,605.50 = 20,605.50 : x
  2. Step 2: Convert to fraction form
    15,435/20,605.50 = 20,605.50/x
  3. Step 3: Cross multiply
    15,435x = 20,605.50 × 20,605.50
  4. Step 4: Simplify right side
    15,435x = 424,586,630.25
  5. Step 5: Solve for x
    x = 424,586,630.25/15,435
  6. Step 6: Final answer
    x = 27,508.04

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.