Home / 20,145.07-30,213.03-7,660.66

Finding the Fourth Proportional to 20,145.07, 30,213.03 and 7,660.66

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Solution

The fourth proportional to 20,145.07, 30,213.03 and 7,660.66 is: 11,489.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.07 : 30,213.03 = 7,660.66 : x
  2. Step 2: Convert to fraction form
    20,145.07/30,213.03 = 7,660.66/x
  3. Step 3: Cross multiply
    20,145.07x = 30,213.03 × 7,660.66
  4. Step 4: Simplify right side
    20,145.07x = 231,451,750.40
  5. Step 5: Solve for x
    x = 231,451,750.40/20,145.07
  6. Step 6: Final answer
    x = 11,489.25

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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.