Home / 20,221.24-30,333.30-5,429.80

Finding the Fourth Proportional to 20,221.24, 30,333.30 and 5,429.80

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Solution

The fourth proportional to 20,221.24, 30,333.30 and 5,429.80 is: 8,145.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,221.24 : 30,333.30 = 5,429.80 : x
  2. Step 2: Convert to fraction form
    20,221.24/30,333.30 = 5,429.80/x
  3. Step 3: Cross multiply
    20,221.24x = 30,333.30 × 5,429.80
  4. Step 4: Simplify right side
    20,221.24x = 164,703,752.34
  5. Step 5: Solve for x
    x = 164,703,752.34/20,221.24
  6. Step 6: Final answer
    x = 8,145.09

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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.