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Finding the Fourth Proportional to 18,141.20, 27,218.20 and 6,454.80

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Solution

The fourth proportional to 18,141.20, 27,218.20 and 6,454.80 is: 9,684.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,141.20 : 27,218.20 = 6,454.80 : x
  2. Step 2: Convert to fraction form
    18,141.20/27,218.20 = 6,454.80/x
  3. Step 3: Cross multiply
    18,141.20x = 27,218.20 × 6,454.80
  4. Step 4: Simplify right side
    18,141.20x = 175,688,037.36
  5. Step 5: Solve for x
    x = 175,688,037.36/18,141.20
  6. Step 6: Final answer
    x = 9,684.48

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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.