Home / 18,117.20-27,139.35-12,212.30

Finding the Fourth Proportional to 18,117.20, 27,139.35 and 12,212.30

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Solution

The fourth proportional to 18,117.20, 27,139.35 and 12,212.30 is: 18,293.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,117.20 : 27,139.35 = 12,212.30 : x
  2. Step 2: Convert to fraction form
    18,117.20/27,139.35 = 12,212.30/x
  3. Step 3: Cross multiply
    18,117.20x = 27,139.35 × 12,212.30
  4. Step 4: Simplify right side
    18,117.20x = 331,433,884.01
  5. Step 5: Solve for x
    x = 331,433,884.01/18,117.20
  6. Step 6: Final answer
    x = 18,293.88

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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.