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Finding the Third Proportional to 20,161.50 and 39,811.50

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Solution

The third proportional to 20,161.50 and 39,811.50 is: 78,612.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,161.50 : 39,811.50 = 39,811.50 : x
  2. Step 2: Convert to fraction form
    20,161.50/39,811.50 = 39,811.50/x
  3. Step 3: Cross multiply
    20,161.50x = 39,811.50 × 39,811.50
  4. Step 4: Simplify right side
    20,161.50x = 1,584,955,532.25
  5. Step 5: Solve for x
    x = 1,584,955,532.25/20,161.50
  6. Step 6: Final answer
    x = 78,612.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.97) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.