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Finding the Third Proportional to 19,390 and 40,220

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Solution

The third proportional to 19,390 and 40,220 is: 83,426.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,390 : 40,220 = 40,220 : x
  2. Step 2: Convert to fraction form
    19,390/40,220 = 40,220/x
  3. Step 3: Cross multiply
    19,390x = 40,220 × 40,220
  4. Step 4: Simplify right side
    19,390x = 1,617,648,400
  5. Step 5: Solve for x
    x = 1,617,648,400/19,390
  6. Step 6: Final answer
    x = 83,426.94

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Why These Related Problems?

These problems maintain the same ratio (2.07) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.