Home / 13,149.20-19,728.40-8,213.04

Finding the Fourth Proportional to 13,149.20, 19,728.40 and 8,213.04

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Solution

The fourth proportional to 13,149.20, 19,728.40 and 8,213.04 is: 12,322.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,149.20 : 19,728.40 = 8,213.04 : x
  2. Step 2: Convert to fraction form
    13,149.20/19,728.40 = 8,213.04/x
  3. Step 3: Cross multiply
    13,149.20x = 19,728.40 × 8,213.04
  4. Step 4: Simplify right side
    13,149.20x = 162,030,138.34
  5. Step 5: Solve for x
    x = 162,030,138.34/13,149.20
  6. Step 6: Final answer
    x = 12,322.43

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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.