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Finding the Third Proportional to 11,896 and 15,428

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Solution

The third proportional to 11,896 and 15,428 is: 20,008.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,896 : 15,428 = 15,428 : x
  2. Step 2: Convert to fraction form
    11,896/15,428 = 15,428/x
  3. Step 3: Cross multiply
    11,896x = 15,428 × 15,428
  4. Step 4: Simplify right side
    11,896x = 238,023,184
  5. Step 5: Solve for x
    x = 238,023,184/11,896
  6. Step 6: Final answer
    x = 20,008.67

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Why These Related Problems?

These problems maintain the same ratio (1.30) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.