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Finding the Third Proportional to 4,920 and 10,840

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Solution

The third proportional to 4,920 and 10,840 is: 23,883.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,920 : 10,840 = 10,840 : x
  2. Step 2: Convert to fraction form
    4,920/10,840 = 10,840/x
  3. Step 3: Cross multiply
    4,920x = 10,840 × 10,840
  4. Step 4: Simplify right side
    4,920x = 117,505,600
  5. Step 5: Solve for x
    x = 117,505,600/4,920
  6. Step 6: Final answer
    x = 23,883.25

Related Problems

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.20) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.