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Finding the Third Proportional to 18,930 and 28,658

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Solution

The third proportional to 18,930 and 28,658 is: 43,385.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,930 : 28,658 = 28,658 : x
  2. Step 2: Convert to fraction form
    18,930/28,658 = 28,658/x
  3. Step 3: Cross multiply
    18,930x = 28,658 × 28,658
  4. Step 4: Simplify right side
    18,930x = 821,280,964
  5. Step 5: Solve for x
    x = 821,280,964/18,930
  6. Step 6: Final answer
    x = 43,385.15

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.