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Finding the Fourth Proportional to 18,622.80, 27,921.78 and 6,774.30

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Solution

The fourth proportional to 18,622.80, 27,921.78 and 6,774.30 is: 10,156.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,622.80 : 27,921.78 = 6,774.30 : x
  2. Step 2: Convert to fraction form
    18,622.80/27,921.78 = 6,774.30/x
  3. Step 3: Cross multiply
    18,622.80x = 27,921.78 × 6,774.30
  4. Step 4: Simplify right side
    18,622.80x = 189,150,514.25
  5. Step 5: Solve for x
    x = 189,150,514.25/18,622.80
  6. Step 6: Final answer
    x = 10,156.93

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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.