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Finding the Third Proportional to 11,120 and 13,280

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Solution

The third proportional to 11,120 and 13,280 is: 15,859.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,120 : 13,280 = 13,280 : x
  2. Step 2: Convert to fraction form
    11,120/13,280 = 13,280/x
  3. Step 3: Cross multiply
    11,120x = 13,280 × 13,280
  4. Step 4: Simplify right side
    11,120x = 176,358,400
  5. Step 5: Solve for x
    x = 176,358,400/11,120
  6. Step 6: Final answer
    x = 15,859.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.