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Finding the Third Proportional to 19,730 and 28,861

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Solution

The third proportional to 19,730 and 28,861 is: 42,217.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,730 : 28,861 = 28,861 : x
  2. Step 2: Convert to fraction form
    19,730/28,861 = 28,861/x
  3. Step 3: Cross multiply
    19,730x = 28,861 × 28,861
  4. Step 4: Simplify right side
    19,730x = 832,957,321
  5. Step 5: Solve for x
    x = 832,957,321/19,730
  6. Step 6: Final answer
    x = 42,217.81

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Why These Related Problems?

These problems maintain the same ratio (1.46) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.