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Finding the Third Proportional to 20,325 and 31,455.50

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Solution

The third proportional to 20,325 and 31,455.50 is: 48,681.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,325 : 31,455.50 = 31,455.50 : x
  2. Step 2: Convert to fraction form
    20,325/31,455.50 = 31,455.50/x
  3. Step 3: Cross multiply
    20,325x = 31,455.50 × 31,455.50
  4. Step 4: Simplify right side
    20,325x = 989,448,480.25
  5. Step 5: Solve for x
    x = 989,448,480.25/20,325
  6. Step 6: Final answer
    x = 48,681.35

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.