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Finding the Third Proportional to 4,020 and 7,424

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Solution

The third proportional to 4,020 and 7,424 is: 13,710.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,020 : 7,424 = 7,424 : x
  2. Step 2: Convert to fraction form
    4,020/7,424 = 7,424/x
  3. Step 3: Cross multiply
    4,020x = 7,424 × 7,424
  4. Step 4: Simplify right side
    4,020x = 55,115,776
  5. Step 5: Solve for x
    x = 55,115,776/4,020
  6. Step 6: Final answer
    x = 13,710.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.85) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.