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Finding the Third Proportional to 15,887 and 21,180.50

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Solution

The third proportional to 15,887 and 21,180.50 is: 28,237.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,887 : 21,180.50 = 21,180.50 : x
  2. Step 2: Convert to fraction form
    15,887/21,180.50 = 21,180.50/x
  3. Step 3: Cross multiply
    15,887x = 21,180.50 × 21,180.50
  4. Step 4: Simplify right side
    15,887x = 448,613,580.25
  5. Step 5: Solve for x
    x = 448,613,580.25/15,887
  6. Step 6: Final answer
    x = 28,237.78

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.