Home / 14,138.20-21,207.30-12,169.90

Finding the Fourth Proportional to 14,138.20, 21,207.30 and 12,169.90

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Solution

The fourth proportional to 14,138.20, 21,207.30 and 12,169.90 is: 18,254.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,138.20 : 21,207.30 = 12,169.90 : x
  2. Step 2: Convert to fraction form
    14,138.20/21,207.30 = 12,169.90/x
  3. Step 3: Cross multiply
    14,138.20x = 21,207.30 × 12,169.90
  4. Step 4: Simplify right side
    14,138.20x = 258,090,720.27
  5. Step 5: Solve for x
    x = 258,090,720.27/14,138.20
  6. Step 6: Final answer
    x = 18,254.85

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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.