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Finding the Third Proportional to 18,921.38 and 40,271.63

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Solution

The third proportional to 18,921.38 and 40,271.63 is: 85,712.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,921.38 : 40,271.63 = 40,271.63 : x
  2. Step 2: Convert to fraction form
    18,921.38/40,271.63 = 40,271.63/x
  3. Step 3: Cross multiply
    18,921.38x = 40,271.63 × 40,271.63
  4. Step 4: Simplify right side
    18,921.38x = 1,621,803,780.14
  5. Step 5: Solve for x
    x = 1,621,803,780.14/18,921.38
  6. Step 6: Final answer
    x = 85,712.79

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Why These Related Problems?

These problems maintain the same ratio (2.13) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.