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Finding the Third Proportional to 9,428 and 12,620

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Solution

The third proportional to 9,428 and 12,620 is: 16,892.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,428 : 12,620 = 12,620 : x
  2. Step 2: Convert to fraction form
    9,428/12,620 = 12,620/x
  3. Step 3: Cross multiply
    9,428x = 12,620 × 12,620
  4. Step 4: Simplify right side
    9,428x = 159,264,400
  5. Step 5: Solve for x
    x = 159,264,400/9,428
  6. Step 6: Final answer
    x = 16,892.70

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.