Home / 14,109.20-21,135.24-6,720.80

Finding the Fourth Proportional to 14,109.20, 21,135.24 and 6,720.80

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Solution

The fourth proportional to 14,109.20, 21,135.24 and 6,720.80 is: 10,067.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,109.20 : 21,135.24 = 6,720.80 : x
  2. Step 2: Convert to fraction form
    14,109.20/21,135.24 = 6,720.80/x
  3. Step 3: Cross multiply
    14,109.20x = 21,135.24 × 6,720.80
  4. Step 4: Simplify right side
    14,109.20x = 142,045,720.99
  5. Step 5: Solve for x
    x = 142,045,720.99/14,109.20
  6. Step 6: Final answer
    x = 10,067.60

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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.