Home / 13,425.45-20,138.04-8,161.92

Finding the Fourth Proportional to 13,425.45, 20,138.04 and 8,161.92

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Solution

The fourth proportional to 13,425.45, 20,138.04 and 8,161.92 is: 12,242.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,425.45 : 20,138.04 = 8,161.92 : x
  2. Step 2: Convert to fraction form
    13,425.45/20,138.04 = 8,161.92/x
  3. Step 3: Cross multiply
    13,425.45x = 20,138.04 × 8,161.92
  4. Step 4: Simplify right side
    13,425.45x = 164,365,071.44
  5. Step 5: Solve for x
    x = 164,365,071.44/13,425.45
  6. Step 6: Final answer
    x = 12,242.80

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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.