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Finding the Fourth Proportional to 18,471.44, 27,711.12 and 5,987.72

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Solution

The fourth proportional to 18,471.44, 27,711.12 and 5,987.72 is: 8,982.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.44 : 27,711.12 = 5,987.72 : x
  2. Step 2: Convert to fraction form
    18,471.44/27,711.12 = 5,987.72/x
  3. Step 3: Cross multiply
    18,471.44x = 27,711.12 × 5,987.72
  4. Step 4: Simplify right side
    18,471.44x = 165,926,427.45
  5. Step 5: Solve for x
    x = 165,926,427.45/18,471.44
  6. Step 6: Final answer
    x = 8,982.86

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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.