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Finding the Third Proportional to 20,430 and 28,910.25

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Solution

The third proportional to 20,430 and 28,910.25 is: 40,910.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430 : 28,910.25 = 28,910.25 : x
  2. Step 2: Convert to fraction form
    20,430/28,910.25 = 28,910.25/x
  3. Step 3: Cross multiply
    20,430x = 28,910.25 × 28,910.25
  4. Step 4: Simplify right side
    20,430x = 835,802,555.06
  5. Step 5: Solve for x
    x = 835,802,555.06/20,430
  6. Step 6: Final answer
    x = 40,910.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.