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Finding the Third Proportional to 15,558.75 and 20,867.63

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Solution

The third proportional to 15,558.75 and 20,867.63 is: 27,987.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,558.75 : 20,867.63 = 20,867.63 : x
  2. Step 2: Convert to fraction form
    15,558.75/20,867.63 = 20,867.63/x
  3. Step 3: Cross multiply
    15,558.75x = 20,867.63 × 20,867.63
  4. Step 4: Simplify right side
    15,558.75x = 435,457,773.14
  5. Step 5: Solve for x
    x = 435,457,773.14/15,558.75
  6. Step 6: Final answer
    x = 27,987.97

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.