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Finding the Fourth Proportional to 18,120.80, 27,181.20 and 4,975.11

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Solution

The fourth proportional to 18,120.80, 27,181.20 and 4,975.11 is: 7,462.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,120.80 : 27,181.20 = 4,975.11 : x
  2. Step 2: Convert to fraction form
    18,120.80/27,181.20 = 4,975.11/x
  3. Step 3: Cross multiply
    18,120.80x = 27,181.20 × 4,975.11
  4. Step 4: Simplify right side
    18,120.80x = 135,229,459.93
  5. Step 5: Solve for x
    x = 135,229,459.93/18,120.80
  6. Step 6: Final answer
    x = 7,462.67

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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.