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Finding the Third Proportional to 15,319.13 and 19,728.56

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Solution

The third proportional to 15,319.13 and 19,728.56 is: 25,407.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,319.13 : 19,728.56 = 19,728.56 : x
  2. Step 2: Convert to fraction form
    15,319.13/19,728.56 = 19,728.56/x
  3. Step 3: Cross multiply
    15,319.13x = 19,728.56 × 19,728.56
  4. Step 4: Simplify right side
    15,319.13x = 389,216,178.32
  5. Step 5: Solve for x
    x = 389,216,178.32/15,319.13
  6. Step 6: Final answer
    x = 25,407.21

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Why These Related Problems?

These problems maintain the same ratio (1.29) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.