Home / 13,418.92-20,132.38-6,404.20

Finding the Fourth Proportional to 13,418.92, 20,132.38 and 6,404.20

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Solution

The fourth proportional to 13,418.92, 20,132.38 and 6,404.20 is: 9,608.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.92 : 20,132.38 = 6,404.20 : x
  2. Step 2: Convert to fraction form
    13,418.92/20,132.38 = 6,404.20/x
  3. Step 3: Cross multiply
    13,418.92x = 20,132.38 × 6,404.20
  4. Step 4: Simplify right side
    13,418.92x = 128,931,788.00
  5. Step 5: Solve for x
    x = 128,931,788.00/13,418.92
  6. Step 6: Final answer
    x = 9,608.21

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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.