Home / 13,709.40-20,564.04-3,321.18

Finding the Fourth Proportional to 13,709.40, 20,564.04 and 3,321.18

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Solution

The fourth proportional to 13,709.40, 20,564.04 and 3,321.18 is: 4,981.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.40 : 20,564.04 = 3,321.18 : x
  2. Step 2: Convert to fraction form
    13,709.40/20,564.04 = 3,321.18/x
  3. Step 3: Cross multiply
    13,709.40x = 20,564.04 × 3,321.18
  4. Step 4: Simplify right side
    13,709.40x = 68,296,878.37
  5. Step 5: Solve for x
    x = 68,296,878.37/13,709.40
  6. Step 6: Final answer
    x = 4,981.76

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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.