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Finding the Third Proportional to 7,447 and 9,787

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Solution

The third proportional to 7,447 and 9,787 is: 12,862.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,447 : 9,787 = 9,787 : x
  2. Step 2: Convert to fraction form
    7,447/9,787 = 9,787/x
  3. Step 3: Cross multiply
    7,447x = 9,787 × 9,787
  4. Step 4: Simplify right side
    7,447x = 95,785,369
  5. Step 5: Solve for x
    x = 95,785,369/7,447
  6. Step 6: Final answer
    x = 12,862.28

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Why These Related Problems?

These problems maintain the same ratio (1.31) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.