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Finding the Third Proportional to 8,645 and 13,047

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Solution

The third proportional to 8,645 and 13,047 is: 19,690.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645 : 13,047 = 13,047 : x
  2. Step 2: Convert to fraction form
    8,645/13,047 = 13,047/x
  3. Step 3: Cross multiply
    8,645x = 13,047 × 13,047
  4. Step 4: Simplify right side
    8,645x = 170,224,209
  5. Step 5: Solve for x
    x = 170,224,209/8,645
  6. Step 6: Final answer
    x = 19,690.48

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.