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Finding the Third Proportional to 12,720 and 26,240

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Solution

The third proportional to 12,720 and 26,240 is: 54,130.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,720 : 26,240 = 26,240 : x
  2. Step 2: Convert to fraction form
    12,720/26,240 = 26,240/x
  3. Step 3: Cross multiply
    12,720x = 26,240 × 26,240
  4. Step 4: Simplify right side
    12,720x = 688,537,600
  5. Step 5: Solve for x
    x = 688,537,600/12,720
  6. Step 6: Final answer
    x = 54,130.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.06) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.