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Finding the Third Proportional to 5,428 and 7,372

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Solution

The third proportional to 5,428 and 7,372 is: 10,012.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,428 : 7,372 = 7,372 : x
  2. Step 2: Convert to fraction form
    5,428/7,372 = 7,372/x
  3. Step 3: Cross multiply
    5,428x = 7,372 × 7,372
  4. Step 4: Simplify right side
    5,428x = 54,346,384
  5. Step 5: Solve for x
    x = 54,346,384/5,428
  6. Step 6: Final answer
    x = 10,012.23

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Why These Related Problems?

These problems maintain the same ratio (1.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.