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Finding the Fourth Proportional to 18,438.12, 27,662.04 and 9,670.68

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Solution

The fourth proportional to 18,438.12, 27,662.04 and 9,670.68 is: 14,508.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.12 : 27,662.04 = 9,670.68 : x
  2. Step 2: Convert to fraction form
    18,438.12/27,662.04 = 9,670.68/x
  3. Step 3: Cross multiply
    18,438.12x = 27,662.04 × 9,670.68
  4. Step 4: Simplify right side
    18,438.12x = 267,510,736.99
  5. Step 5: Solve for x
    x = 267,510,736.99/18,438.12
  6. Step 6: Final answer
    x = 14,508.57

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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.