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Finding the Fourth Proportional to 20,419.83, 30,629.97 and 6,379.29

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Solution

The fourth proportional to 20,419.83, 30,629.97 and 6,379.29 is: 9,569.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.83 : 30,629.97 = 6,379.29 : x
  2. Step 2: Convert to fraction form
    20,419.83/30,629.97 = 6,379.29/x
  3. Step 3: Cross multiply
    20,419.83x = 30,629.97 × 6,379.29
  4. Step 4: Simplify right side
    20,419.83x = 195,397,461.32
  5. Step 5: Solve for x
    x = 195,397,461.32/20,419.83
  6. Step 6: Final answer
    x = 9,569.01

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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.