Home / 13,709.12-20,563.68-3,320.87

Finding the Fourth Proportional to 13,709.12, 20,563.68 and 3,320.87

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Solution

The fourth proportional to 13,709.12, 20,563.68 and 3,320.87 is: 4,981.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.12 : 20,563.68 = 3,320.87 : x
  2. Step 2: Convert to fraction form
    13,709.12/20,563.68 = 3,320.87/x
  3. Step 3: Cross multiply
    13,709.12x = 20,563.68 × 3,320.87
  4. Step 4: Simplify right side
    13,709.12x = 68,289,308.00
  5. Step 5: Solve for x
    x = 68,289,308.00/13,709.12
  6. Step 6: Final answer
    x = 4,981.31

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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.