Home / 13,106.82-19,660.11-5,313.78

Finding the Fourth Proportional to 13,106.82, 19,660.11 and 5,313.78

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Solution

The fourth proportional to 13,106.82, 19,660.11 and 5,313.78 is: 7,970.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,106.82 : 19,660.11 = 5,313.78 : x
  2. Step 2: Convert to fraction form
    13,106.82/19,660.11 = 5,313.78/x
  3. Step 3: Cross multiply
    13,106.82x = 19,660.11 × 5,313.78
  4. Step 4: Simplify right side
    13,106.82x = 104,469,499.32
  5. Step 5: Solve for x
    x = 104,469,499.32/13,106.82
  6. Step 6: Final answer
    x = 7,970.62

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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.