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Finding the Third Proportional to 3,988 and 9,428

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Solution

The third proportional to 3,988 and 9,428 is: 22,288.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,988 : 9,428 = 9,428 : x
  2. Step 2: Convert to fraction form
    3,988/9,428 = 9,428/x
  3. Step 3: Cross multiply
    3,988x = 9,428 × 9,428
  4. Step 4: Simplify right side
    3,988x = 88,887,184
  5. Step 5: Solve for x
    x = 88,887,184/3,988
  6. Step 6: Final answer
    x = 22,288.66

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Why These Related Problems?

These problems maintain the same ratio (2.36) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.