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Finding the Fourth Proportional to 8,720.73, 13,080.98 and 2,146.97

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Solution

The fourth proportional to 8,720.73, 13,080.98 and 2,146.97 is: 3,220.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.73 : 13,080.98 = 2,146.97 : x
  2. Step 2: Convert to fraction form
    8,720.73/13,080.98 = 2,146.97/x
  3. Step 3: Cross multiply
    8,720.73x = 13,080.98 × 2,146.97
  4. Step 4: Simplify right side
    8,720.73x = 28,084,395.49
  5. Step 5: Solve for x
    x = 28,084,395.49/8,720.73
  6. Step 6: Final answer
    x = 3,220.42

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.