Home / 20,120.64-30,178.92-7,635.24

Finding the Fourth Proportional to 20,120.64, 30,178.92 and 7,635.24

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Solution

The fourth proportional to 20,120.64, 30,178.92 and 7,635.24 is: 11,452.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.64 : 30,178.92 = 7,635.24 : x
  2. Step 2: Convert to fraction form
    20,120.64/30,178.92 = 7,635.24/x
  3. Step 3: Cross multiply
    20,120.64x = 30,178.92 × 7,635.24
  4. Step 4: Simplify right side
    20,120.64x = 230,423,297.14
  5. Step 5: Solve for x
    x = 230,423,297.14/20,120.64
  6. Step 6: Final answer
    x = 11,452.09

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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.