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Finding the Third Proportional to 25,720 and 38,640

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Solution

The third proportional to 25,720 and 38,640 is: 58,050.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,720 : 38,640 = 38,640 : x
  2. Step 2: Convert to fraction form
    25,720/38,640 = 38,640/x
  3. Step 3: Cross multiply
    25,720x = 38,640 × 38,640
  4. Step 4: Simplify right side
    25,720x = 1,493,049,600
  5. Step 5: Solve for x
    x = 1,493,049,600/25,720
  6. Step 6: Final answer
    x = 58,050.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.