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Finding the Third Proportional to 14,720 and 21,880

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Solution

The third proportional to 14,720 and 21,880 is: 32,522.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,720 : 21,880 = 21,880 : x
  2. Step 2: Convert to fraction form
    14,720/21,880 = 21,880/x
  3. Step 3: Cross multiply
    14,720x = 21,880 × 21,880
  4. Step 4: Simplify right side
    14,720x = 478,734,400
  5. Step 5: Solve for x
    x = 478,734,400/14,720
  6. Step 6: Final answer
    x = 32,522.72

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.