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Finding the Fourth Proportional to 18,512.28, 27,768.42 and 8,656.20

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Solution

The fourth proportional to 18,512.28, 27,768.42 and 8,656.20 is: 12,984.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,512.28 : 27,768.42 = 8,656.20 : x
  2. Step 2: Convert to fraction form
    18,512.28/27,768.42 = 8,656.20/x
  3. Step 3: Cross multiply
    18,512.28x = 27,768.42 × 8,656.20
  4. Step 4: Simplify right side
    18,512.28x = 240,368,997.20
  5. Step 5: Solve for x
    x = 240,368,997.20/18,512.28
  6. Step 6: Final answer
    x = 12,984.30

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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.