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Finding the Third Proportional to 12,128 and 15,600

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Solution

The third proportional to 12,128 and 15,600 is: 20,065.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,128 : 15,600 = 15,600 : x
  2. Step 2: Convert to fraction form
    12,128/15,600 = 15,600/x
  3. Step 3: Cross multiply
    12,128x = 15,600 × 15,600
  4. Step 4: Simplify right side
    12,128x = 243,360,000
  5. Step 5: Solve for x
    x = 243,360,000/12,128
  6. Step 6: Final answer
    x = 20,065.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.