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Finding the Third Proportional to 18,970.50 and 29,311.50

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Solution

The third proportional to 18,970.50 and 29,311.50 is: 45,289.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,970.50 : 29,311.50 = 29,311.50 : x
  2. Step 2: Convert to fraction form
    18,970.50/29,311.50 = 29,311.50/x
  3. Step 3: Cross multiply
    18,970.50x = 29,311.50 × 29,311.50
  4. Step 4: Simplify right side
    18,970.50x = 859,164,032.25
  5. Step 5: Solve for x
    x = 859,164,032.25/18,970.50
  6. Step 6: Final answer
    x = 45,289.48

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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.