Home / 14,272.20-21,408.30-12,090.60

Finding the Fourth Proportional to 14,272.20, 21,408.30 and 12,090.60

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Solution

The fourth proportional to 14,272.20, 21,408.30 and 12,090.60 is: 18,135.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,272.20 : 21,408.30 = 12,090.60 : x
  2. Step 2: Convert to fraction form
    14,272.20/21,408.30 = 12,090.60/x
  3. Step 3: Cross multiply
    14,272.20x = 21,408.30 × 12,090.60
  4. Step 4: Simplify right side
    14,272.20x = 258,839,191.98
  5. Step 5: Solve for x
    x = 258,839,191.98/14,272.20
  6. Step 6: Final answer
    x = 18,135.90

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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.