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Finding the Third Proportional to 3,924 and 7,020

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Solution

The third proportional to 3,924 and 7,020 is: 12,558.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924 : 7,020 = 7,020 : x
  2. Step 2: Convert to fraction form
    3,924/7,020 = 7,020/x
  3. Step 3: Cross multiply
    3,924x = 7,020 × 7,020
  4. Step 4: Simplify right side
    3,924x = 49,280,400
  5. Step 5: Solve for x
    x = 49,280,400/3,924
  6. Step 6: Final answer
    x = 12,558.72

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Why These Related Problems?

These problems maintain the same ratio (1.79) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.