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Finding the Third Proportional to 18,989 and 29,478.75

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Solution

The third proportional to 18,989 and 29,478.75 is: 45,763.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,989 : 29,478.75 = 29,478.75 : x
  2. Step 2: Convert to fraction form
    18,989/29,478.75 = 29,478.75/x
  3. Step 3: Cross multiply
    18,989x = 29,478.75 × 29,478.75
  4. Step 4: Simplify right side
    18,989x = 868,996,701.56
  5. Step 5: Solve for x
    x = 868,996,701.56/18,989
  6. Step 6: Final answer
    x = 45,763.16

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.