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Finding the Third Proportional to 3,946 and 9,130

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Solution

The third proportional to 3,946 and 9,130 is: 21,124.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,946 : 9,130 = 9,130 : x
  2. Step 2: Convert to fraction form
    3,946/9,130 = 9,130/x
  3. Step 3: Cross multiply
    3,946x = 9,130 × 9,130
  4. Step 4: Simplify right side
    3,946x = 83,356,900
  5. Step 5: Solve for x
    x = 83,356,900/3,946
  6. Step 6: Final answer
    x = 21,124.40

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Why These Related Problems?

These problems maintain the same ratio (2.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.