Home / 18,138.08-27,221.60-12,335.20

Finding the Fourth Proportional to 18,138.08, 27,221.60 and 12,335.20

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Solution

The fourth proportional to 18,138.08, 27,221.60 and 12,335.20 is: 18,512.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,138.08 : 27,221.60 = 12,335.20 : x
  2. Step 2: Convert to fraction form
    18,138.08/27,221.60 = 12,335.20/x
  3. Step 3: Cross multiply
    18,138.08x = 27,221.60 × 12,335.20
  4. Step 4: Simplify right side
    18,138.08x = 335,783,880.32
  5. Step 5: Solve for x
    x = 335,783,880.32/18,138.08
  6. Step 6: Final answer
    x = 18,512.65

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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.