Home / 13,404.78-18,500.54-8,100.36

Finding the Fourth Proportional to 13,404.78, 18,500.54 and 8,100.36

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Solution

The fourth proportional to 13,404.78, 18,500.54 and 8,100.36 is: 11,179.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,404.78 : 18,500.54 = 8,100.36 : x
  2. Step 2: Convert to fraction form
    13,404.78/18,500.54 = 8,100.36/x
  3. Step 3: Cross multiply
    13,404.78x = 18,500.54 × 8,100.36
  4. Step 4: Simplify right side
    13,404.78x = 149,860,993.69
  5. Step 5: Solve for x
    x = 149,860,993.69/13,404.78
  6. Step 6: Final answer
    x = 11,179.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.