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Finding the Third Proportional to 20,418 and 28,900

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Solution

The third proportional to 20,418 and 28,900 is: 40,905.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418 : 28,900 = 28,900 : x
  2. Step 2: Convert to fraction form
    20,418/28,900 = 28,900/x
  3. Step 3: Cross multiply
    20,418x = 28,900 × 28,900
  4. Step 4: Simplify right side
    20,418x = 835,210,000
  5. Step 5: Solve for x
    x = 835,210,000/20,418
  6. Step 6: Final answer
    x = 40,905.57

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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.