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Finding the Fourth Proportional to 18,011.28, 27,016.44 and 10,113.78

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Solution

The fourth proportional to 18,011.28, 27,016.44 and 10,113.78 is: 15,170.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,011.28 : 27,016.44 = 10,113.78 : x
  2. Step 2: Convert to fraction form
    18,011.28/27,016.44 = 10,113.78/x
  3. Step 3: Cross multiply
    18,011.28x = 27,016.44 × 10,113.78
  4. Step 4: Simplify right side
    18,011.28x = 273,238,330.54
  5. Step 5: Solve for x
    x = 273,238,330.54/18,011.28
  6. Step 6: Final answer
    x = 15,170.40

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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.