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Finding the Third Proportional to 18,784 and 28,118

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Solution

The third proportional to 18,784 and 28,118 is: 42,090.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,784 : 28,118 = 28,118 : x
  2. Step 2: Convert to fraction form
    18,784/28,118 = 28,118/x
  3. Step 3: Cross multiply
    18,784x = 28,118 × 28,118
  4. Step 4: Simplify right side
    18,784x = 790,621,924
  5. Step 5: Solve for x
    x = 790,621,924/18,784
  6. Step 6: Final answer
    x = 42,090.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.