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Finding the Third Proportional to 28,128 and 40,200

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Solution

The third proportional to 28,128 and 40,200 is: 57,453.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,128 : 40,200 = 40,200 : x
  2. Step 2: Convert to fraction form
    28,128/40,200 = 40,200/x
  3. Step 3: Cross multiply
    28,128x = 40,200 × 40,200
  4. Step 4: Simplify right side
    28,128x = 1,616,040,000
  5. Step 5: Solve for x
    x = 1,616,040,000/28,128
  6. Step 6: Final answer
    x = 57,453.07

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.