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Finding the Fourth Proportional to 18,562.20, 27,843.30 and 13,021.80

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Solution

The fourth proportional to 18,562.20, 27,843.30 and 13,021.80 is: 19,532.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,562.20 : 27,843.30 = 13,021.80 : x
  2. Step 2: Convert to fraction form
    18,562.20/27,843.30 = 13,021.80/x
  3. Step 3: Cross multiply
    18,562.20x = 27,843.30 × 13,021.80
  4. Step 4: Simplify right side
    18,562.20x = 362,569,883.94
  5. Step 5: Solve for x
    x = 362,569,883.94/18,562.20
  6. Step 6: Final answer
    x = 19,532.70

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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.