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Finding the Fourth Proportional to 13,449.80, 20,177.40 and 4,090.40

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Solution

The fourth proportional to 13,449.80, 20,177.40 and 4,090.40 is: 6,136.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,449.80 : 20,177.40 = 4,090.40 : x
  2. Step 2: Convert to fraction form
    13,449.80/20,177.40 = 4,090.40/x
  3. Step 3: Cross multiply
    13,449.80x = 20,177.40 × 4,090.40
  4. Step 4: Simplify right side
    13,449.80x = 82,533,636.96
  5. Step 5: Solve for x
    x = 82,533,636.96/13,449.80
  6. Step 6: Final answer
    x = 6,136.42

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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.