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Finding the Third Proportional to 14,421 and 18,428

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Solution

The third proportional to 14,421 and 18,428 is: 23,548.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,421 : 18,428 = 18,428 : x
  2. Step 2: Convert to fraction form
    14,421/18,428 = 18,428/x
  3. Step 3: Cross multiply
    14,421x = 18,428 × 18,428
  4. Step 4: Simplify right side
    14,421x = 339,591,184
  5. Step 5: Solve for x
    x = 339,591,184/14,421
  6. Step 6: Final answer
    x = 23,548.38

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Why These Related Problems?

These problems maintain the same ratio (1.28) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.