Home / 13,421.09-20,138.09-5,529.36

Finding the Fourth Proportional to 13,421.09, 20,138.09 and 5,529.36

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Solution

The fourth proportional to 13,421.09, 20,138.09 and 5,529.36 is: 8,296.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.09 : 20,138.09 = 5,529.36 : x
  2. Step 2: Convert to fraction form
    13,421.09/20,138.09 = 5,529.36/x
  3. Step 3: Cross multiply
    13,421.09x = 20,138.09 × 5,529.36
  4. Step 4: Simplify right side
    13,421.09x = 111,350,797.19
  5. Step 5: Solve for x
    x = 111,350,797.19/13,421.09
  6. Step 6: Final answer
    x = 8,296.70

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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.