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Finding the Fourth Proportional to 18,404.20, 27,606.30 and 16,978.60

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Solution

The fourth proportional to 18,404.20, 27,606.30 and 16,978.60 is: 25,467.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,404.20 : 27,606.30 = 16,978.60 : x
  2. Step 2: Convert to fraction form
    18,404.20/27,606.30 = 16,978.60/x
  3. Step 3: Cross multiply
    18,404.20x = 27,606.30 × 16,978.60
  4. Step 4: Simplify right side
    18,404.20x = 468,716,325.18
  5. Step 5: Solve for x
    x = 468,716,325.18/18,404.20
  6. Step 6: Final answer
    x = 25,467.90

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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.