Home / 18,109.32-27,169.40-12,209.86

Finding the Fourth Proportional to 18,109.32, 27,169.40 and 12,209.86

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Solution

The fourth proportional to 18,109.32, 27,169.40 and 12,209.86 is: 18,318.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,109.32 : 27,169.40 = 12,209.86 : x
  2. Step 2: Convert to fraction form
    18,109.32/27,169.40 = 12,209.86/x
  3. Step 3: Cross multiply
    18,109.32x = 27,169.40 × 12,209.86
  4. Step 4: Simplify right side
    18,109.32x = 331,734,570.28
  5. Step 5: Solve for x
    x = 331,734,570.28/18,109.32
  6. Step 6: Final answer
    x = 18,318.44

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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.