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Finding the Third Proportional to 7,564 and 11,987

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Solution

The third proportional to 7,564 and 11,987 is: 18,996.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,564 : 11,987 = 11,987 : x
  2. Step 2: Convert to fraction form
    7,564/11,987 = 11,987/x
  3. Step 3: Cross multiply
    7,564x = 11,987 × 11,987
  4. Step 4: Simplify right side
    7,564x = 143,688,169
  5. Step 5: Solve for x
    x = 143,688,169/7,564
  6. Step 6: Final answer
    x = 18,996.32

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Why These Related Problems?

These problems maintain the same ratio (1.58) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.