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Finding the Third Proportional to 5,920 and 12,840

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Solution

The third proportional to 5,920 and 12,840 is: 27,848.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,920 : 12,840 = 12,840 : x
  2. Step 2: Convert to fraction form
    5,920/12,840 = 12,840/x
  3. Step 3: Cross multiply
    5,920x = 12,840 × 12,840
  4. Step 4: Simplify right side
    5,920x = 164,865,600
  5. Step 5: Solve for x
    x = 164,865,600/5,920
  6. Step 6: Final answer
    x = 27,848.92

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.