Home / 20,220.12-30,351.78-11,472.12

Finding the Fourth Proportional to 20,220.12, 30,351.78 and 11,472.12

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Solution

The fourth proportional to 20,220.12, 30,351.78 and 11,472.12 is: 17,220.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,220.12 : 30,351.78 = 11,472.12 : x
  2. Step 2: Convert to fraction form
    20,220.12/30,351.78 = 11,472.12/x
  3. Step 3: Cross multiply
    20,220.12x = 30,351.78 × 11,472.12
  4. Step 4: Simplify right side
    20,220.12x = 348,199,262.37
  5. Step 5: Solve for x
    x = 348,199,262.37/20,220.12
  6. Step 6: Final answer
    x = 17,220.44

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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.