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Finding the Third Proportional to 7,428 and 15,819

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Solution

The third proportional to 7,428 and 15,819 is: 33,688.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,428 : 15,819 = 15,819 : x
  2. Step 2: Convert to fraction form
    7,428/15,819 = 15,819/x
  3. Step 3: Cross multiply
    7,428x = 15,819 × 15,819
  4. Step 4: Simplify right side
    7,428x = 250,240,761
  5. Step 5: Solve for x
    x = 250,240,761/7,428
  6. Step 6: Final answer
    x = 33,688.85

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.