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Finding the Third Proportional to 19,987 and 43,430

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Solution

The third proportional to 19,987 and 43,430 is: 94,369.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987 : 43,430 = 43,430 : x
  2. Step 2: Convert to fraction form
    19,987/43,430 = 43,430/x
  3. Step 3: Cross multiply
    19,987x = 43,430 × 43,430
  4. Step 4: Simplify right side
    19,987x = 1,886,164,900
  5. Step 5: Solve for x
    x = 1,886,164,900/19,987
  6. Step 6: Final answer
    x = 94,369.59

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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.