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Finding the Third Proportional to 28,720 and 40,536

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Solution

The third proportional to 28,720 and 40,536 is: 57,213.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,720 : 40,536 = 40,536 : x
  2. Step 2: Convert to fraction form
    28,720/40,536 = 40,536/x
  3. Step 3: Cross multiply
    28,720x = 40,536 × 40,536
  4. Step 4: Simplify right side
    28,720x = 1,643,167,296
  5. Step 5: Solve for x
    x = 1,643,167,296/28,720
  6. Step 6: Final answer
    x = 57,213.35

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.