Home / 13,480.12-20,172.34-8,213.55

Finding the Fourth Proportional to 13,480.12, 20,172.34 and 8,213.55

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Solution

The fourth proportional to 13,480.12, 20,172.34 and 8,213.55 is: 12,291.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,480.12 : 20,172.34 = 8,213.55 : x
  2. Step 2: Convert to fraction form
    13,480.12/20,172.34 = 8,213.55/x
  3. Step 3: Cross multiply
    13,480.12x = 20,172.34 × 8,213.55
  4. Step 4: Simplify right side
    13,480.12x = 165,686,571.30
  5. Step 5: Solve for x
    x = 165,686,571.30/13,480.12
  6. Step 6: Final answer
    x = 12,291.18

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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.