Home / 20,439.88-30,643.25-6,392.68

Finding the Fourth Proportional to 20,439.88, 30,643.25 and 6,392.68

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Solution

The fourth proportional to 20,439.88, 30,643.25 and 6,392.68 is: 9,583.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439.88 : 30,643.25 = 6,392.68 : x
  2. Step 2: Convert to fraction form
    20,439.88/30,643.25 = 6,392.68/x
  3. Step 3: Cross multiply
    20,439.88x = 30,643.25 × 6,392.68
  4. Step 4: Simplify right side
    20,439.88x = 195,892,491.41
  5. Step 5: Solve for x
    x = 195,892,491.41/20,439.88
  6. Step 6: Final answer
    x = 9,583.84

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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.