Home / 20,419.32-30,628.97-6,380.56

Finding the Fourth Proportional to 20,419.32, 30,628.97 and 6,380.56

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Solution

The fourth proportional to 20,419.32, 30,628.97 and 6,380.56 is: 9,570.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,419.32 : 30,628.97 = 6,380.56 : x
  2. Step 2: Convert to fraction form
    20,419.32/30,628.97 = 6,380.56/x
  3. Step 3: Cross multiply
    20,419.32x = 30,628.97 × 6,380.56
  4. Step 4: Simplify right side
    20,419.32x = 195,429,980.82
  5. Step 5: Solve for x
    x = 195,429,980.82/20,419.32
  6. Step 6: Final answer
    x = 9,570.84

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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.