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Finding the Third Proportional to 4,678 and 9,428

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Solution

The third proportional to 4,678 and 9,428 is: 19,001.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,678 : 9,428 = 9,428 : x
  2. Step 2: Convert to fraction form
    4,678/9,428 = 9,428/x
  3. Step 3: Cross multiply
    4,678x = 9,428 × 9,428
  4. Step 4: Simplify right side
    4,678x = 88,887,184
  5. Step 5: Solve for x
    x = 88,887,184/4,678
  6. Step 6: Final answer
    x = 19,001.11

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Why These Related Problems?

These problems maintain the same ratio (2.02) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.