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Finding the Third Proportional to 15,129 and 19,777.50

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Solution

The third proportional to 15,129 and 19,777.50 is: 25,854.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,129 : 19,777.50 = 19,777.50 : x
  2. Step 2: Convert to fraction form
    15,129/19,777.50 = 19,777.50/x
  3. Step 3: Cross multiply
    15,129x = 19,777.50 × 19,777.50
  4. Step 4: Simplify right side
    15,129x = 391,149,506.25
  5. Step 5: Solve for x
    x = 391,149,506.25/15,129
  6. Step 6: Final answer
    x = 25,854.29

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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.