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Finding the Third Proportional to 18,865.13 and 21,345.75

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Solution

The third proportional to 18,865.13 and 21,345.75 is: 24,152.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,865.13 : 21,345.75 = 21,345.75 : x
  2. Step 2: Convert to fraction form
    18,865.13/21,345.75 = 21,345.75/x
  3. Step 3: Cross multiply
    18,865.13x = 21,345.75 × 21,345.75
  4. Step 4: Simplify right side
    18,865.13x = 455,641,043.06
  5. Step 5: Solve for x
    x = 455,641,043.06/18,865.13
  6. Step 6: Final answer
    x = 24,152.56

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Why These Related Problems?

These problems maintain the same ratio (1.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.