Home / 20,147.46-30,221.10-7,664.55

Finding the Fourth Proportional to 20,147.46, 30,221.10 and 7,664.55

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Solution

The fourth proportional to 20,147.46, 30,221.10 and 7,664.55 is: 11,496.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,147.46 : 30,221.10 = 7,664.55 : x
  2. Step 2: Convert to fraction form
    20,147.46/30,221.10 = 7,664.55/x
  3. Step 3: Cross multiply
    20,147.46x = 30,221.10 × 7,664.55
  4. Step 4: Simplify right side
    20,147.46x = 231,631,132.01
  5. Step 5: Solve for x
    x = 231,631,132.01/20,147.46
  6. Step 6: Final answer
    x = 11,496.79

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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.