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Finding the Third Proportional to 19,986 and 43,428

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Solution

The third proportional to 19,986 and 43,428 is: 94,365.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,986 : 43,428 = 43,428 : x
  2. Step 2: Convert to fraction form
    19,986/43,428 = 43,428/x
  3. Step 3: Cross multiply
    19,986x = 43,428 × 43,428
  4. Step 4: Simplify right side
    19,986x = 1,885,991,184
  5. Step 5: Solve for x
    x = 1,885,991,184/19,986
  6. Step 6: Final answer
    x = 94,365.62

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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.