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Finding the Third Proportional to 19,440 and 28,512

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Solution

The third proportional to 19,440 and 28,512 is: 41,817.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,440 : 28,512 = 28,512 : x
  2. Step 2: Convert to fraction form
    19,440/28,512 = 28,512/x
  3. Step 3: Cross multiply
    19,440x = 28,512 × 28,512
  4. Step 4: Simplify right side
    19,440x = 812,934,144
  5. Step 5: Solve for x
    x = 812,934,144/19,440
  6. Step 6: Final answer
    x = 41,817.60

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Why These Related Problems?

These problems maintain the same ratio (1.47) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.