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Finding the Third Proportional to 8,709.19 and 12,858.75

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Solution

The third proportional to 8,709.19 and 12,858.75 is: 18,985.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,709.19 : 12,858.75 = 12,858.75 : x
  2. Step 2: Convert to fraction form
    8,709.19/12,858.75 = 12,858.75/x
  3. Step 3: Cross multiply
    8,709.19x = 12,858.75 × 12,858.75
  4. Step 4: Simplify right side
    8,709.19x = 165,347,451.56
  5. Step 5: Solve for x
    x = 165,347,451.56/8,709.19
  6. Step 6: Final answer
    x = 18,985.40

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Why These Related Problems?

These problems maintain the same ratio (1.48) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.