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Finding the Fourth Proportional to 18,471.58, 27,719.50 and 6,784.90

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Solution

The fourth proportional to 18,471.58, 27,719.50 and 6,784.90 is: 10,181.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,471.58 : 27,719.50 = 6,784.90 : x
  2. Step 2: Convert to fraction form
    18,471.58/27,719.50 = 6,784.90/x
  3. Step 3: Cross multiply
    18,471.58x = 27,719.50 × 6,784.90
  4. Step 4: Simplify right side
    18,471.58x = 188,074,035.55
  5. Step 5: Solve for x
    x = 188,074,035.55/18,471.58
  6. Step 6: Final answer
    x = 10,181.81

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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.