Home / 12,102.92-18,138.68-5,434.48

Finding the Fourth Proportional to 12,102.92, 18,138.68 and 5,434.48

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Solution

The fourth proportional to 12,102.92, 18,138.68 and 5,434.48 is: 8,144.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,102.92 : 18,138.68 = 5,434.48 : x
  2. Step 2: Convert to fraction form
    12,102.92/18,138.68 = 5,434.48/x
  3. Step 3: Cross multiply
    12,102.92x = 18,138.68 × 5,434.48
  4. Step 4: Simplify right side
    12,102.92x = 98,574,293.69
  5. Step 5: Solve for x
    x = 98,574,293.69/12,102.92
  6. Step 6: Final answer
    x = 8,144.67

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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.