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Finding the Fourth Proportional to 20,395.33, 30,584.76 and 7,908.78

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Solution

The fourth proportional to 20,395.33, 30,584.76 and 7,908.78 is: 11,859.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,395.33 : 30,584.76 = 7,908.78 : x
  2. Step 2: Convert to fraction form
    20,395.33/30,584.76 = 7,908.78/x
  3. Step 3: Cross multiply
    20,395.33x = 30,584.76 × 7,908.78
  4. Step 4: Simplify right side
    20,395.33x = 241,888,138.19
  5. Step 5: Solve for x
    x = 241,888,138.19/20,395.33
  6. Step 6: Final answer
    x = 11,859.98

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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.