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Finding the Fourth Proportional to 18,662.32, 27,977.60 and 8,268.40

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Solution

The fourth proportional to 18,662.32, 27,977.60 and 8,268.40 is: 12,395.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,662.32 : 27,977.60 = 8,268.40 : x
  2. Step 2: Convert to fraction form
    18,662.32/27,977.60 = 8,268.40/x
  3. Step 3: Cross multiply
    18,662.32x = 27,977.60 × 8,268.40
  4. Step 4: Simplify right side
    18,662.32x = 231,329,987.84
  5. Step 5: Solve for x
    x = 231,329,987.84/18,662.32
  6. Step 6: Final answer
    x = 12,395.56

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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.