Home / 13,179.12-18,189.24-8,468.40

Finding the Fourth Proportional to 13,179.12, 18,189.24 and 8,468.40

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Solution

The fourth proportional to 13,179.12, 18,189.24 and 8,468.40 is: 11,687.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.12 : 18,189.24 = 8,468.40 : x
  2. Step 2: Convert to fraction form
    13,179.12/18,189.24 = 8,468.40/x
  3. Step 3: Cross multiply
    13,179.12x = 18,189.24 × 8,468.40
  4. Step 4: Simplify right side
    13,179.12x = 154,033,760.02
  5. Step 5: Solve for x
    x = 154,033,760.02/13,179.12
  6. Step 6: Final answer
    x = 11,687.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.