Home / 13,572.40-20,351.22-4,209.88

Finding the Fourth Proportional to 13,572.40, 20,351.22 and 4,209.88

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Solution

The fourth proportional to 13,572.40, 20,351.22 and 4,209.88 is: 6,312.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.40 : 20,351.22 = 4,209.88 : x
  2. Step 2: Convert to fraction form
    13,572.40/20,351.22 = 4,209.88/x
  3. Step 3: Cross multiply
    13,572.40x = 20,351.22 × 4,209.88
  4. Step 4: Simplify right side
    13,572.40x = 85,676,194.05
  5. Step 5: Solve for x
    x = 85,676,194.05/13,572.40
  6. Step 6: Final answer
    x = 6,312.53

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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.