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Finding the Fourth Proportional to 20,419.76, 30,629.62 and 6,568.76

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Solution

The fourth proportional to 20,419.76, 30,629.62 and 6,568.76 is: 9,853.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.76 : 30,629.62 = 6,568.76 : x
  2. Step 2: Convert to fraction form
    20,419.76/30,629.62 = 6,568.76/x
  3. Step 3: Cross multiply
    20,419.76x = 30,629.62 × 6,568.76
  4. Step 4: Simplify right side
    20,419.76x = 201,198,622.67
  5. Step 5: Solve for x
    x = 201,198,622.67/20,419.76
  6. Step 6: Final answer
    x = 9,853.13

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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.