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Finding the Third Proportional to 12,642.75 and 19,138.13

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Solution

The third proportional to 12,642.75 and 19,138.13 is: 28,970.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,642.75 : 19,138.13 = 19,138.13 : x
  2. Step 2: Convert to fraction form
    12,642.75/19,138.13 = 19,138.13/x
  3. Step 3: Cross multiply
    12,642.75x = 19,138.13 × 19,138.13
  4. Step 4: Simplify right side
    12,642.75x = 366,267,828.52
  5. Step 5: Solve for x
    x = 366,267,828.52/12,642.75
  6. Step 6: Final answer
    x = 28,970.58

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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.