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Finding the Third Proportional to 13,137.19 and 19,705.78

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Solution

The third proportional to 13,137.19 and 19,705.78 is: 29,558.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,137.19 : 19,705.78 = 19,705.78 : x
  2. Step 2: Convert to fraction form
    13,137.19/19,705.78 = 19,705.78/x
  3. Step 3: Cross multiply
    13,137.19x = 19,705.78 × 19,705.78
  4. Step 4: Simplify right side
    13,137.19x = 388,317,814.67
  5. Step 5: Solve for x
    x = 388,317,814.67/13,137.19
  6. Step 6: Final answer
    x = 29,558.67

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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.