Home / 13,478.27-20,220.03-4,118.72

Finding the Fourth Proportional to 13,478.27, 20,220.03 and 4,118.72

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Solution

The fourth proportional to 13,478.27, 20,220.03 and 4,118.72 is: 6,178.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,478.27 : 20,220.03 = 4,118.72 : x
  2. Step 2: Convert to fraction form
    13,478.27/20,220.03 = 4,118.72/x
  3. Step 3: Cross multiply
    13,478.27x = 20,220.03 × 4,118.72
  4. Step 4: Simplify right side
    13,478.27x = 83,280,540.86
  5. Step 5: Solve for x
    x = 83,280,540.86/13,478.27
  6. Step 6: Final answer
    x = 6,178.88

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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.