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Finding the Third Proportional to 2,142 and 4,620

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Solution

The third proportional to 2,142 and 4,620 is: 9,964.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,142 : 4,620 = 4,620 : x
  2. Step 2: Convert to fraction form
    2,142/4,620 = 4,620/x
  3. Step 3: Cross multiply
    2,142x = 4,620 × 4,620
  4. Step 4: Simplify right side
    2,142x = 21,344,400
  5. Step 5: Solve for x
    x = 21,344,400/2,142
  6. Step 6: Final answer
    x = 9,964.71

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.