Home / 13,608.90-20,390.97-8,404.02

Finding the Fourth Proportional to 13,608.90, 20,390.97 and 8,404.02

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Solution

The fourth proportional to 13,608.90, 20,390.97 and 8,404.02 is: 12,592.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.90 : 20,390.97 = 8,404.02 : x
  2. Step 2: Convert to fraction form
    13,608.90/20,390.97 = 8,404.02/x
  3. Step 3: Cross multiply
    13,608.90x = 20,390.97 × 8,404.02
  4. Step 4: Simplify right side
    13,608.90x = 171,366,119.70
  5. Step 5: Solve for x
    x = 171,366,119.70/13,608.90
  6. Step 6: Final answer
    x = 12,592.21

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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.