Home / 12,245.21-18,358.77-3,920.41

Finding the Fourth Proportional to 12,245.21, 18,358.77 and 3,920.41

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Solution

The fourth proportional to 12,245.21, 18,358.77 and 3,920.41 is: 5,877.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,245.21 : 18,358.77 = 3,920.41 : x
  2. Step 2: Convert to fraction form
    12,245.21/18,358.77 = 3,920.41/x
  3. Step 3: Cross multiply
    12,245.21x = 18,358.77 × 3,920.41
  4. Step 4: Simplify right side
    12,245.21x = 71,973,905.50
  5. Step 5: Solve for x
    x = 71,973,905.50/12,245.21
  6. Step 6: Final answer
    x = 5,877.72

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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.