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Finding the Third Proportional to 18,718.50 and 40,555.50

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Solution

The third proportional to 18,718.50 and 40,555.50 is: 87,867.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.50 : 40,555.50 = 40,555.50 : x
  2. Step 2: Convert to fraction form
    18,718.50/40,555.50 = 40,555.50/x
  3. Step 3: Cross multiply
    18,718.50x = 40,555.50 × 40,555.50
  4. Step 4: Simplify right side
    18,718.50x = 1,644,748,580.25
  5. Step 5: Solve for x
    x = 1,644,748,580.25/18,718.50
  6. Step 6: Final answer
    x = 87,867.54

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.