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Finding the Fourth Proportional to 18,515.81, 27,738.84 and 9,144.86

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Solution

The fourth proportional to 18,515.81, 27,738.84 and 9,144.86 is: 13,700.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,515.81 : 27,738.84 = 9,144.86 : x
  2. Step 2: Convert to fraction form
    18,515.81/27,738.84 = 9,144.86/x
  3. Step 3: Cross multiply
    18,515.81x = 27,738.84 × 9,144.86
  4. Step 4: Simplify right side
    18,515.81x = 253,667,808.36
  5. Step 5: Solve for x
    x = 253,667,808.36/18,515.81
  6. Step 6: Final answer
    x = 13,700.07

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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.