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Finding the Third Proportional to 8,712 and 13,108.50

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Solution

The third proportional to 8,712 and 13,108.50 is: 19,723.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,712 : 13,108.50 = 13,108.50 : x
  2. Step 2: Convert to fraction form
    8,712/13,108.50 = 13,108.50/x
  3. Step 3: Cross multiply
    8,712x = 13,108.50 × 13,108.50
  4. Step 4: Simplify right side
    8,712x = 171,832,772.25
  5. Step 5: Solve for x
    x = 171,832,772.25/8,712
  6. Step 6: Final answer
    x = 19,723.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.