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Finding the Third Proportional to 19,720 and 29,785

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Solution

The third proportional to 19,720 and 29,785 is: 44,987.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,720 : 29,785 = 29,785 : x
  2. Step 2: Convert to fraction form
    19,720/29,785 = 29,785/x
  3. Step 3: Cross multiply
    19,720x = 29,785 × 29,785
  4. Step 4: Simplify right side
    19,720x = 887,146,225
  5. Step 5: Solve for x
    x = 887,146,225/19,720
  6. Step 6: Final answer
    x = 44,987.13

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.