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Finding the Third Proportional to 18,928 and 30,240

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Solution

The third proportional to 18,928 and 30,240 is: 48,312.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,928 : 30,240 = 30,240 : x
  2. Step 2: Convert to fraction form
    18,928/30,240 = 30,240/x
  3. Step 3: Cross multiply
    18,928x = 30,240 × 30,240
  4. Step 4: Simplify right side
    18,928x = 914,457,600
  5. Step 5: Solve for x
    x = 914,457,600/18,928
  6. Step 6: Final answer
    x = 48,312.43

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Why These Related Problems?

These problems maintain the same ratio (1.60) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.