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Finding the Third Proportional to 19,988 and 29,820

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Solution

The third proportional to 19,988 and 29,820 is: 44,488.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,988 : 29,820 = 29,820 : x
  2. Step 2: Convert to fraction form
    19,988/29,820 = 29,820/x
  3. Step 3: Cross multiply
    19,988x = 29,820 × 29,820
  4. Step 4: Simplify right side
    19,988x = 889,232,400
  5. Step 5: Solve for x
    x = 889,232,400/19,988
  6. Step 6: Final answer
    x = 44,488.31

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.